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Landscape orientation is not supported! Please turn your device to portrait mode. See the Wavelength Tuning tab for more details.
This plot shows data for the IO-3-1064-HP.
Graphs showing the isolation and transmission for each isolator tuned to the center wavelength are provided on the Graphs tab.
Optical isolators, also known as Faraday isolators, are magneto-optic devices that preferentially transmit light along a single direction, shielding на этой странице optics from back reflections.
Back reflections can create a number of instabilities in light sources, including intensity noise, frequency shifts, mode hopping, and loss of mode lock.
In addition, intense back-reflected light can permanently damage optics.
Please see the Isolator Tutorial tab for an explanation of the operating principles of a Faraday isolator.
For applications at Nd:YAG wavelengths, we offer four types of isolators.
The first type, Fixed Narrowband Isolators, contains fixed, factory-aligned optics, for which peak isolation and peak transmission occurs at a pre-defined center wavelength.
Any deviation from this wavelength will cause a dip in isolation and transmission.
The second type, Adjustable Narrowband Isolators, offers the user the ability to adjust the alignment of the input and output polarizers, allowing tuning of the center wavelength within a 45 nm range.
The third type, Tandem Narrowband Isolators, consists of two Faraday rotators in series, boosting the isolation to at least 55 dB at the expense of lower transmission.
The fourth type, Polarization-Independent Isolators, achieves the same performance characteristics regardless of the input polarization, greatly simplifying alignment.
Please see the Isolator Types tab for additional design details and representative graphs of the wavelength-dependent isolation.
Selection Guide for Isolators Click for Our Full Selection Free-Space Isolators Spectral Region Wavelength Range UV Visible NIR Nd:YAG 1064 nm IR MIR The housing of each isolator shown here, except for the IO-D-1064-VLP, is marked with an arrow that indicates the direction of forward propagation.
The input and output apertures of the IO-D-1064-VLP are Комплект Smart SBX880i6 by the black and gold coloring of the cylinder, respectively.
All isolators shown here including the IO-D-1064-VLP have engravings that indicate the alignment of the input and output polarizers.
Thorlabs also manufactures for wavelengths from the UV to the infrared see the Selection Guide table to the left.
As indicated in the tables below and pictured to the right, many of our stock isolators can also be provided in a mount designed for our.
If Thorlabs does not stock an isolator suited for your application, please refer to the Custom Isolators tab for information on our build-to-order options, or contact.
Thorlabs' in-house manufacturing service has over 25 years of experience and can deliver a free-space isolator tuned to your center wavelength from 244 nm to 4.
Blue shaded regions on a graph represent the center wavelength tuning range of the isolator see the Wavelength Tuning tab for more information.
With these isolators, the isolation and transmission curves will shift as the center wavelength shifts.
If the graph is not blue shaded, then the isolator is non-tunable.
Please note that these curves were made from theoretical data and that isolation and transmission will vary from unit to unit.
The IO-3-1064-VHP, IO-5-1064-VHP, and Ссылка на подробности are Fixed Narrowband Isolators for use at 1064 5 />For operation centered at 1053 nm, please prior приведенная ссылка ordering.
This plot shows transmission data for the IO-3-1064-HP.
Graphs showing the transmission when each isolator is tuned to the center wavelength are provided on the Graphs tab.
Our Adjustable Narrowband Isolators can be tuned to maximize the peak isolation for any wavelength within a narrow spectral range shaded in this graph.
This plot shows isolation data for the IO-3-1064-HP.
Graphs showing the isolation when each isolator is tuned to the center wavelength are provided on the Graphs tab.
Light at the Design Wavelength is Rejected Operating Principles of Optical Isolators Thorlabs' Adjustable Narrowband Isolators are designed to provide the same peak isolation anywhere within a 45 nm tuning range.
They contain a Faraday rotator that has been factory tuned to rotate light of the design wavelength by 45°.
Light propagating through the isolator in the backward direction is polarized at 45° by the output polarizer and is rotated by 45° by the Faraday rotator, giving a net polarization of 90° relative to 5 transmission axis of the input polarizer.
Therefore, an isolator rejects backward propagating light.
See the Isolator Tutorial tab for a schematic of the beam path.
The magnitude of the rotation caused by the Faraday rotator is wavelength dependent.
This means that light with a different wavelength than the design wavelength will not be rotated at exactly 45°.
For example, if 1064 nm light is rotated by 45° that is, 1064 nm is the design wavelengththen 1054 nm light is rotated by 46.
If 1054 nm light is sent backward through an isolator designed for 1064 nm without any tweaking, it will have a net polarization of 45° + 46.
The polarization component of the light 5 5 the input polarizer's axis will be transmitted, and the isolation will therefore be significantly reduced.
Since the net polarization needs to be 90° to obtain high isolation, the output polarizer is rotated to compensate for the extra rotation being caused by the Faraday isolator.
In our example, the new polarizer angle is 90° - 46.
This adjustment increases the isolation back to the same value as at the design wavelength.
Consequences of Wavelength Tuning Procedure As a direct consequence of rotating the output polarizer, the maximum transmission in the forward direction decreases.
The amount of the transmission decrease can be quantified using Malus' Law: Malus' Law Here, θ is the angle between the polarization direction of the light after the Faraday rotator and the transmission axis of the polarizer, I 0 is the incident intensity, and I is the transmitted intensity.
For small deviations from the center wavelength, the decrease in transmission is very slight, but for larger deviations, the decrease becomes noticeable.
This case is shown in the graphs above.
In applications, the decrease in transmission caused by the tuning procedure is usually less important than the significantly enhanced isolation gained by tuning.
For example, if the 1064 nm isolator shown in the graphs above were used источник статьи 1044 nm without tuning, the transmission would be 92.
This case is also shown in the graphs above.
Thorlabs' isolator housings make it easy to rotate the output polarizer without disturbing the rest of the isolator.
Our custom isolator manufacturing service see the Custom Isolators tab can also provide an isolator specifically designed for a particular center wavelength, which can eliminate or strongly mitigate the transmission losses that occur at the edges of the tuning range.
These custom isolators are provided at the same cost as their equivalent stock counterparts.
For more information, please contact.
Illustrated Tuning Приведу ссылку To optimize the isolation curve for a specific wavelength within the tuning range, the alignment of the output polarizer may be tweaked following the simple procedure outlined below.
Only a minor adjustment is necessary to cover a range of several nanometers.
The procedure differs slightly for different isolator packages, but the principle remains the same across our entire isolator family, and complete model-specific tuning instructions ship with each isolator.
Step 1: Orient the isolator in the backward direction with respect to the beam i.
A with high sensitivity at low power levels should be placed after the isolator.
Step 2: Grip the isolator by the sides and gently bring it out of its saddle.
It is only necessary to bring it out far enough to expose the 8-32 setscrew at the top, as shown in the photo to the 5 />The isolator is mechanically 5 in 5 position as long as the isolator has not been brought forward too much.
The amount shown in the image to the left is safe by several millimeters.
It should therefore not be necessary to reinsert the isolator at the end of the tuning procedure.
At this point, the output polarizer will be free to rotate.
Step 5: Rotate 5 output polarizer to minimize the power on the power meter.
As explained above, the necessary adjustment should be only a few degrees, depending upon the desired center wavelength.
Tighten the 8-32 setscrew once optimization is achieved.
As long as the isolator was not brought forward too much at the end of Step 2, the isolator will be mechanically stable in this position.
Attempting to reinsert the isolator at this point may cause misalignment.
Fixed Narrowband Isolator The isolator is set for 45° of rotation at the design wavelength.
The polarizers are non-adjustable and are set to provide maximum isolation at the design wavelength.
As the wavelength changes the isolation will drop; the graph shows a representative profile.
If the usage wavelength changes, the Faraday rotation will change, thereby decreasing the isolation.
To regain maximum isolation, the output polarizer can be rotated to "re-center" the isolation curve.
This rotation causes transmission losses in the forward direction that increase as the difference between the usage wavelength and the design wavelength grows.
There is a tuning ring on the isolator that adjusts the amount of Faraday rotator material that is inserted into the internal magnet.
As your usage wavelength changes, the Faraday rotation will change, thereby decreasing the isolation.
To regain maximum isolation, the tuning ring is adjusted to produce the 45° of rotation necessary for maximum isolation.
The wavelength dependences of the two rotator materials work together to produce a flat-top isolation profile.
The isolator does not require any tuning or adjustment for operation within the designated design bandwidth.
Since the two rotators cancel each other, the net rotation at the output is 0°.
Our tandem designs yield narrowband isolators that may be fixed or adjustable.
Their design characteristics are detailed below.
The part number of given isolator has an identifier for the type of polarizer that isolator contains.
For more details on how the part number describes подробнее на этой странице isolator, see the given isolator's manual.
This gives these polarizers a higher maximum power density.
They consist of a linearly spaced wire grid pattern that is deposited onto an AR-coated silicon substrate.
These are similar to the High Power HP polarizers, but have a different escape angle.
The rejected beam is internally scattered, which reduces the maximum power density, but also eliminates a stray beam from the setup.
They feature an escape window suited for injection locking.
The rejected beam is internally scattered, which reduces the maximum power density, but also eliminates a stray beam from the setup.
These polarizers have larger packages than HP-based designs, but are also more economical.
All VHP-based designs also feature escape windows.
Optical Isolator Tutorial Function An optical isolator is a passive magneto-optic device that only allows light to travel in one direction.
Isolators are used to protect a source from back reflections or signals that may occur after the isolator.
Back reflections can damage a laser source or cause it to mode hop, amplitude modulate, or frequency shift.
In high-power applications, back reflections can cause instabilities and power spikes.
An isolator's function is based on the Faraday Effect.
In 1842, Michael Faraday discovered that the plane of polarized light rotates while transmitting through glass or other materials that is exposed to a magnetic field.
The direction of rotation is dependent on the direction of the magnetic field and not on the direction of light propagation; thus, the rotation is non-reciprocal.
The amount of rotation β equals V x B x d, where V, B, and d are as defined below.
B: the magnetic flux density in teslas.
An optical isolator consists of an input polarizer, a Faraday rotator with magnet, and an output polarizer.
The input polarizer works as a filter to allow only linearly polarized light into the Faraday rotator.
The Faraday element rotates the input light's polarization by 45°, after which it exits through another linear polarizer.
The output light is now rotated by 45° with respect to the input signal.
In the нажмите для деталей direction, the Faraday rotator continues to rotate the light's polarization in the same direction that it did in the forward direction so that the polarization of the light is now rotated 90° with respect to the input signal.
This light's polarization is now perpendicular to the transmission axis of the input polarizer, and as a result, the energy is either reflected or absorbed depending on the type of polarizer.
Light propagating in the reverse direction is rejected by the input polarizer.
Polarization-Dependent Isolators The Forward Mode In this example, детальнее на этой странице will assume that the input polarizer's axis is vertical 0° in Figure 2.
Laser light, either polarized or unpolarized, enters the input polarizer and becomes vertically polarized.
The Faraday rotator will rotate the plane of polarization POP by 45° in the positive direction.
Finally, the light exits through the output polarizer which has its axis at 45°.
Therefore, the light leaves the isolator with a POP of 45°.
The Reverse Mode Light traveling backwards through the isolator will first enter the output polarizer, which polarizes the light at 45° with respect to the input polarizer.
It then passes through the Faraday rotator 5, and the POP is rotated another 45° in the positive direction.
This results in a net rotation of 90° with respect to the input polarizer, and thus, the POP is now perpendicular to the transmission axis of the input polarizer.
Hence, the light will either be reflected or absorbed.
A polarization independent isolator.
Light is deflected away from the input path and stopped by the housing.
Polarization-Independent Fiber Isolators The Forward Mode In a polarization independent fiber isolator, the incoming light is split into two branches by a birefringent crystal see Figure 3.
A Faraday rotator and a half-wave plate rotate the polarization of each branch before they encounter a second birefringent crystal aligned to recombine the two beams.
The Reverse Mode Back-reflected light will encounter the second birefringent crystal and be split into two beams with their polarizations aligned with the forward mode light.
The faraday rotator is a non-reciprocal rotator, so it will cancel out the rotation introduced by the half wave plate for the reverse mode light.
When the light encounters the input birefringent beam displacer, it will be deflected away from the collimating lens and into the walls of the isolator housing, preventing the reverse mode from entering the input fiber.
General Information Damage Threshold With 25 years of experience and 5 U.
For visible to YAG laser Isolators, Thorlabs' Faraday Rotator crystal of choice is TGG terbium-gallium-garnetwhich is unsurpassed in terms of optical quality, Verdet constant, and resistance to high laser power.
Thorlabs' TGG Isolator rods have been damage tested to 22.
However, Thorlabs does not bear responsibility for laser power damage that is attributed to hot spots in the beam.
Pulse Dispersion Measurements Before and After an IO-5-780-HP Https://megapixels.ru/komplekt/zazhim-avenger-c1550-super-clamp.html Magnet The magnet is a major factor in determining the size and performance of an isolator.
The ultimate size of the magnet is not simply determined by magnetic field strength but is also influenced by the mechanical узнать больше здесь />Many Thorlabs magnets are not simple one piece magnets but are complex assemblies.
Thorlabs' modeling systems allow optimization of the many parameters that affect size, optical path length, total rotation, and field uniformity.
Ресепшен Сеть US Patent 4,856,878 describes one such design that is used in several of the larger aperture isolators for YAG lasers.
Thorlabs emphasizes that a powerful magnetic field exists around these Isolators, and thus, steel or magnetic 5 should not be brought closer than 5 cm.
Temperature The magnets and the Faraday rotator materials both exhibit a temperature dependence.
Both the magnetic field strength and the Verdet Constant decrease with increased temperature.
For operation greater than ±10 °C beyond room temperature, please contact.
Pulse Dispersion Pulse broadening occurs anytime a pulse propagates through a material with an index of refraction greater than 1.
This dispersion increases inversely with the pulse width and therefore can become significant in ultrafast lasers.
We currently offer same-day shipping on more than 90 isolator models.
In addition to these stock models, non-stock isolators with differing aperture sizes, wavelength ranges, package sizes, and polarizers are available.
In addition, we can create isolators tuned for specific operating temperatures and isolators that incorporate thermistors with heating or cooling elements for active temperature control and monitoring.
These generally have the same price as a similar stock unit.
If you would like a quote on a non-stock isolator, please fill out the form below and a member of our staff will be with Винт DIN965 М4x12 (16000 шт) please contact with you.
Thorlabs has many years of experience working with OEM, government, and research customers, allowing us to tailor your isolator to specific design requirements.
In addition to customizing our isolators see the OEM Application Services list to the rightwe also consider, Штативная площадка Velbon QB-5RL delirium various application services.
Therefore, the sum of the powers in the forward and reverse directions cannot exceed the maximum power specification.
Free-Space Isolators We are able to provide a wide range of flexibility in manufacturing non-stock, free-space isolators.
Almost any selection of specifications from our standard product line can be combined to suit a particular need.
The table to the right shows the range of specifications that we can meet.
We offer isolators suitable for both narrowband and broadband applications.
The size of the housing is very dependent on the desired maximum power and aperture size, so please include a note in the quote form below if you have special requirements.
Faraday Rotators 5 can also offer Faraday rotators which rotate the polarization of incoming light by 45° ± 3°.
These are similar to our isolators but with the polarizers at each end removed.
They are available with center wavelengths from 244 to 5000 nm.
Please contact for more information.
Therefore, the sum of the powers in the forward and reverse directions cannot exceed the maximum power specification.
Fiber Isolators Thorlabs is uniquely positioned to draw on experience in classical optics, fiber coupling, and isolators to provide flexible designs for a wide range of fiber optic specifications.
Current design efforts are focused on increasing the Maximum power of our fiber isolators at and near the 1064 nm wavelength.
We offer models with integrated ASE filters and taps.
The table to the right highlights the range of specifications that we can meet.
The fiber used is often the limiting factor in determining the Maximum power the isolator can handle.
We have experience working with single mode SM and polarization-maintaining fibers PM ; single- double- and triple-clad fibers; and specialty fibers like 10-to-30 µm LMA fibers and PM LMA fibers.
For more information about the fiber options available with our custom isolators, please see the expandable tables below.
In the spectral region below 633 nm, we recommend mounting one of our free-space isolators in a system.
A FiberBench system consists of pre-designed modules that make it easy to use free-space optical elements with a fiber optic system while maintaining excellent coupling efficiency.
Upon request, we can provide select stock isolators in an optic mount with twin steel dowel pins for our FiberBench systems, as shown to the left.
We are also in the process of extending our fiber isolator capabilities down into the visible region.
For more information, please contact.
Polarization Independent Fiber Wavelength Range Mode Field Diameter Numerical Aperture Fiber Type 633 - 780 nm 3.
We keep the majority of the components for these custom isolators in stock to ensure quick builds, so these specials are available with an average lead time of only 2-4 weeks.
Please use the Non-Stock Isolator Worksheet below for a quote.
Non-Stock Isolator Worksheet: Please select your input type: Free-Space Нажмите для продолжения Fiber Input Is this an ITAR request?
Information and material pertaining to military and defense related technology may only be shared with U.
Persons unless authorization from the Department of State is received or a special exemption is used.
Also, I'd like to know the size of the magneto-optic material, in particular the length of the material along the propagation direction.
Hello, thank you for contacting Thorlabs.
The Faraday rotator in the IO-3D-1064-VLP is made of a 12.
What are the pulse damage threshold specifications for the VLP designated isolators?
Is there also a pulse energy threshold?
Response from Jeremy at Thorlabs: The IO-5-1064-VHP does not have a standard mounting method for the FiberBench.
Due to its size, the optical center would be well above the center line of the end brackets on the FiberBench.
We can make a high power version which can be fitted onto the FiberBench.
We will contact you directly about this.
Does it come with a holder?
Response from Jeremy at Thorlabs: There are polarizers both before and after the Faraday rotator.
The mount included with each isolator depends on the exact model but we have other mounts or adapters available.
These components could be incorporated into a number of devices, but the standard price is very high compared to the competition competitors for example for the amount of 5 pcs.
Therefore, it would be nice if you could have lower prices for higher volume.
The competitive advantage that Thorlabs has is the fast delivery time, which is nice.
Response from Javier at Thorlabs to last poster: Thank you very much for contacting us.
All of the optic components are rated to be able to handle this power level; however, we have not yet tested the effects of heating on the device.
Please contact us at techsupport thorlabs.
Do you guarantee all the specifications of IO-10-1064-VHP if we use it with 200W CW laser at room temp?
We are concerned that the 200W laser makes the isolator heat-up, and the specified parameters isolation are not achievable.
Response from Javier at Thorlabs to Rolando Espindola: Thank you for submitting 5 inquiry.
These power specifications apply to all isolators that have the VHP or HP or LP polarizer designations.
The following selection guide contains all of Thorlabs' Free-Space Optical Isolators.
Click the colored bars below to to see specifications and options for each wavelength range and isolator type.
Please note that Thorlabs also offers and.
Performance Graph Click for Details Max Beam Diameter d 2.
Adequate should be selected and positioned to ensure safety.
However, tapped holes in the housing allow the isolator to be mounted with the polarization axis either parallel or perpendicular to the base of the mount.
If you require free rotation for your setup, consider using an or adapter see below for details.
For operation centered at 1053 nm, please prior to ordering.
Therefore, the sum of the powers in the forward and reverse directions cannot exceed the maximum power specification.
Therefore, the sum of the powers in the forward and reverse directions cannot exceed the maximum power specification.
Unlike the other free-space isolators on this page, its transmission and isolation do not depend on the input polarization.
This makes the isolator ideal for applications where the polarization state is indeterminate or variable.
This isolator is excellent for system development projects where new fiber optic systems are being built and tested.
The polarization-independent nature of the isolator allows users to experiment with different collimators and couplers as power levels increase in the fiber optic system.
Please see our for our fiber-to-free-space isolators.
If you require this part for line production, please contact our.
For an M4-threaded saddle, please contact prior to ordering.
However, tapped holes in the housing allow the isolator to be mounted with the polarization axis either parallel or perpendicular to the base of the mount.
If you require free rotation for your setup, consider using an or adapter see below for details.
Therefore, the sum of the powers in the forward and reverse directions cannot exceed the maximum power specification.
Free-Space Isolator, 1064 nm, Ø4.
Sales: +49 0 8131-5956-0 Technical Support: +49 0 8131-5956-2 × This website uses cookiesThis site uses cookies.
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