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Fiber Isolators & Circulators

The GK-FCIR Series Polarization Insensitive Mini Fiber Circulator by GKER Photonics Co., Ltd is a compact, high-performance optical device designed for efficient signal routing in modern fiber optic networks. Engineered to route optical signals from Port 1 to Port 2 and from Port 2 to Port 3, it features ultra-low insertion loss, ...

Specifications

Type Of The Device: Circulator
Operating Wavelength: 1310 nm
Max Power: 300 W
Min Isolation: 45 dB
Center Wavelength (λc): 1310, 1550 nm
The High Power PM Isolator (1310nm / 1550nm) from Lfiber is a premium optical component designed to suppress unwanted back reflections and feedback in high-power fiber optic systems. Built for robustness and precision, this isolator ensures stable optical signal transmission in demanding applications such as PM fiber lasers, ...

Specifications

Type Of The Device: Isolator
Operating Wavelength: 1310 nm
Max Power: 20 W
Min Isolation: 28 dB
Stage: Single-stage, Dual-stage
The Ascentta 3-Port Polarization-Maintaining Optical Circulator (TGG Type) is engineered to provide precise unidirectional signal routing while preserving polarization integrity across a range of wavelengths from 532 nm to 1060 nm. Designed for high-performance optical systems, this circulator is optimized for demanding applications ...

Specifications

Type Of The Device: Circulator
Operating Wavelength: 980 nm
Max Power: 0.25 W
Min Isolation: 22 dB
Insertion Loss (Fast Axis Block) (1→2, Or 2→3) Max.: 1.5 dB
The Ascentta PM 3-Port Optical Circulator (TGG Type) is designed for polarization-maintaining fiber optic applications operating across a wide range of wavelengths including 532, 635, 650, 780, 850, 980, 1030, and 1060 nm. It utilizes high-quality TGG crystals and advanced optical path alignment to provide efficient signal routing ...

Specifications

Type Of The Device: Circulator
Operating Wavelength: 850 nm
Max Power: 0.15 W
Min Isolation: 21 dB
Insertion Loss (Fast Axis Block) (1→2, Or 2→3) Max.: 1.8 dB
The Polarization-Dependent 3-Port Circulator Core (TGG Type) by Ascentta Inc. is engineered for precise optical signal routing in demanding photonics applications. Designed to operate across key wavelengths—532 nm to 1064 nm—this compact circulator core utilizes the Faraday effect in TGG (terbium gallium garnet) material ...

Specifications

Type Of The Device: Circulator
Operating Wavelength: 532 nm
Max Power: 5 W
Min Isolation: 21 dB
Insertion Loss (23℃, All SOP*) (1→2, Or 2→3) Max: 0.6 dB
The Ascentta PM 3-Port Optical Circulator is a high-performance, polarization-maintaining circulator designed for advanced optical systems operating at wavelengths of 1310, 1480, 1550, or 1590 nm. Engineered for precision, it supports both single-stage and dual-stage configurations, offering flexibility in performance requirements. ...

Specifications

Type Of The Device: Circulator
Operating Wavelength: 1310 nm
Max Power: 0.3 W
Min Isolation: 40 dB
Bandwidth: +-20 nm
The 850nm High Power Polarization Independent Isolator is characterized with low insertion loss, high isolation, high power handling, high return loss, excellent environmental stability and reliability. It is ideal for fiber laser and instrumentation applications. The high-power isolator series includes in-line type, beam expanded ...

Specifications

Type Of The Device: Isolator
Operating Wavelength: 850 nm
Max Power: 1 W
Min Isolation: 28 dB
Operating Wavelength Range: ±10 nm
The GKER Photonics Mini Polarization Insensitive Isolator (GK-MPI Series) is a compact, high-performance optical component designed for space-constrained applications in fiber optic systems. This isolator is engineered to block back-reflected light while maintaining stable performance across all polarization states. With options for ...

Specifications

Type Of The Device: Isolator
Operating Wavelength: 1310 nm
Max Power: 0.3 W
Min Isolation: 28 dB
Center Wavelength (λc): 1310, 1480, 1550 nm
The 2 in 1 Polarization Insensitive Isolator from the TPI Series represents a remarkable advancement in optical isolation technology. This innovative device seamlessly integrates two independent isolators into a single, space-saving package, delivering enhanced efficiency and versatility to fiber optic communication systems. Crafted ...

Specifications

Type Of The Device: Isolator
Operating Wavelength: 1310 nm
Max Power: 0.3 W
Min Isolation: 30 dB
Center Wavelength (λc): 1310, 1480, 1550 nm
The GKER Photonics 1064 nm Polarization Insensitive Isolator (GK-PSSI & GK-PDSI Series) is designed to block unwanted back reflections and feedback in high-power laser systems while maintaining reliable performance across all polarization states. With its advanced optical design and compact packaging, the isolator provides high ...

Specifications

Type Of The Device: Isolator
Operating Wavelength: 1064 nm
Max Power: 0.3 W
Min Isolation: 28 dB
Center Wavelength (λc): 1064 nm
The 1064nm High Power Circulator is a high performance light wave component that routes incoming signals from Port 1 to Port 2, and incoming Port 2 signals to Port 3. They’re characterized with low insertion loss, high isolation, high power handling, high return loss, low PDL, low PMD, excellent environmental stability and ...

Specifications

Type Of The Device: Circulator
Operating Wavelength: 980 nm
Max Power: 10 W
Min Isolation: 22 dB
Operating Wavelength Range: ±10 nm
The 980nm High Power Polarization-Independent Optical Isolator is engineered to deliver exceptional performance in high-power fiber optic systems. Operating at a central wavelength of 980 nm, this isolator effectively suppresses back reflections and backscattering, ensuring unidirectional light transmission and protecting sensitive ...

Specifications

Type Of The Device: Isolator
Operating Wavelength: 980 nm
Max Power: 20 W
Min Isolation: 25 dB
Operating Wavelength Range: ±15 nm
The 1064nm TGG Based Optical Isolator is engineered with cutting-edge technology, offering exceptional performance in fiber optic communication systems. This isolator boasts low insertion loss, high isolation, high power handling, and superior environmental stability. It finds extensive applications in Fiber Amplifiers, Fiber ...

Specifications

Type Of The Device: Isolator
Operating Wavelength: 1064 nm
Max Power: 20 W
Min Isolation: 26 dB
Operating Wavelength Range: ±10 nm
The 1064nm High Power Polarization-Independent Isolator is designed for superior performance in high-power fiber laser systems and optical setups that demand robust protection from back reflections. Capable of handling up to 10W of optical power, this isolator provides reliable isolation of forward and backward propagating light, ...

Specifications

Type Of The Device: Isolator
Operating Wavelength: 1064 nm
Max Power: 10 W
Min Isolation: 30 dB
Operating Wavelength Range: ±10 nm
The 1064nm High Power Polarization-Insensitive Optical Circulator is engineered for advanced photonic systems requiring efficient signal routing and high-power handling. Operating at a central wavelength of 1064 nm, this circulator ensures reliable performance across various applications, including fiber laser systems, optical ...

Specifications

Type Of The Device: Circulator
Operating Wavelength: 1064 nm
Max Power: 10 W
Min Isolation: 22 dB
The 780/808nm High Power Polarization-Independent Isolator is designed for high-performance optical systems where protection from back reflections and feedback is critical. Operating efficiently at both 780nm and 808nm, this isolator offers excellent isolation with minimal insertion loss, ensuring optimal performance in fiber laser ...

Specifications

Type Of The Device: Isolator
Operating Wavelength: 780 nm
Max Power: 10 W
Min Isolation: 30 dB
DK Photonics presents the 1064nm TGG Based PM Optical Circulator, a high-performance light-wave component designed to efficiently route incoming signals from Port 1 to Port 2 and Port 2 signals to Port 3. The 1064nm polarization maintaining optical circulators are characterized with low insertion loss, high isolation, high PER, high ...

Specifications

Type Of The Device: Circulator
Operating Wavelength: 1064 nm
Max Power: 10 W
Min Isolation: 25 dB
Operating Wavelength Range: ±10 nm
The 1064nm Polarization Insensitive Isolator by DK Photonics is a cutting-edge optical device employing the Faraday Effect of magneto-optical crystal. This isolator efficiently guides optical light in one direction while eliminating back reflection and back scattering in the reverse direction, regardless of polarization state. With ...

Specifications

Type Of The Device: Circulator
Operating Wavelength: 1064 nm
Max Power: 0.2 W
Min Isolation: 45 dB
Bandwidth: +/-5nm
Optical isolators can block back lection and backscattering in the reverse direction at any polarization sate. They have low polarization mode dispersion (PMD). The optical path is epoxy-free, thereby enabling high-power applications. They are based on the micro-optics package technology and featured with the best stability and ...

Specifications

Type Of The Device: Isolator
Operating Wavelength: 1585 nm
Max Power: 0.3 W
Min Isolation: 30 dB
Enhance your optical communication systems with the Mini Size 1310 and 1550nm Polarization-Insensitive Optical Isolator. Engineered for applications requiring high isolation and low insertion loss, this compact isolator effectively suppresses back reflections and backscattering, ensuring optimal signal integrity in fiber optic networks.

Specifications

Type Of The Device: Isolator
Operating Wavelength: 1310 nm
Max Power: 0.3 W
Min Isolation: 28 dB

Frequently Asked Questions

An optical isolator contains a Faraday rotator, a component characterized by rotating input linear polarization by 45 degrees. It is important to note that the direction of polarization rotation is dependent on the orientation of the Faraday rotator but not on the light travel direction. In other words, if, for instance, the polarization is rotating clockwise relative to the propagation direction, in the reverse-propagation direction, the rotation will be counter-clockwise. At the input of an optical isolator there is a linear polarizer ensuring that only linearly polarized line enters the system. There is a second linear polarizer present at the exist that let’s through the light that is now rotated by 45 degrees relative to the input. If there is a back reflection from any subsequent optical components in the system, the light might be able to back enter from the exit polarizer and further rotate in the same direction by 45 degrees resulting in a 90 degree rotation relative the orientation of the entrance polarizer, which will block the light from passing through the system in the reverse direction.

Yes, the rotation degree of the polarization is dependent on the optical wavelength of the input light. Additionally, the polarizers and the other elements of an optical isolator may have special optical coatings which are also wavelength dependent. Some optical isolators are only suitable for a specific wavelength, while others can operate over a range of wavelengths.

Yes, this is true for optical isolators containing polarizers. However, polarization-independent isolators exist.

Yes, optical circulators and isolators that are suitable for free-space coupling have been designed and are used in free-space communication systems. They are often used to reduce or eliminate back-reflection of light from the optical system that otherwise might enter the laser and deteriorate its performance and even damage it.

Yes, in the case of polarization-dependent circulators, the polarization of the input beam should be linear and match the input polarizer orientation. However, polarization-independent optical circulators exist and are used in fiber optical communications as the polarization state of light is likely to vary as it propagates through the fiber.

Both components are widely used in optical communications systems to send signals along different channels. They are also used in dispersion compensation devices or as means to protect laser systems from back reflection. Optical isolators are also used in multistage amplified laser systems to prevent back-reflection from entering back into the laser which can deteriorate or damage the laser system.

Enhancing Optical Systems with Fiber Isolators and Circulators

Introduction

In the realm of fiber-optic communications, maintaining signal integrity and efficient routing is paramount. Fiber isolators and fiber circulators play pivotal roles in achieving these objectives, serving as fundamental components in various optical applications.

Fiber Isolators: Protecting Optical Integrity

Fiber isolators are designed to transmit light in a single direction while blocking any back-reflected light. This unidirectional flow is achieved through non-reciprocal optical elements, such as Faraday rotators, which rotate the polarization of light, allowing it to pass in one direction and attenuating it in the reverse.

The primary function of fiber isolators is to protect laser sources from back-reflections, which can cause instability, noise, or even damage. By preventing reflected light from re-entering the laser cavity, isolators ensure consistent output and prolong the lifespan of the laser.

Applications of fiber isolators include:

  • Laser Protection: Safeguarding lasers in optical communication systems.

  • Optical Amplifiers: Enhancing the performance of amplifiers by minimizing feedback.

  • Measurement Systems: Ensuring accurate readings by eliminating unwanted reflections.

Fiber Circulators: Enabling Bidirectional Communication

Fiber circulators are multi-port, non-reciprocal devices that direct light from one port to the next in a sequential manner. For instance, light entering port 1 exits through port 2; any light entering port 2 exits through port 3, and so on. This functionality allows for the separation and routing of signals traveling in opposite directions within a single fiber.

The unique properties of fiber circulators make them indispensable in complex optical systems. They enable:

  • Bidirectional Transmission: Facilitating two-way communication over a single fiber.

  • Wavelength Division Multiplexing (WDM): Allowing multiple wavelengths to be added or dropped in DWDM systems.

  • Optical Sensing: Enhancing the capabilities of fiber-optic sensors by directing signals appropriately.

Integration in Optical Systems

The integration of fiber isolators and circulators into optical networks leads to:

  • Improved Signal Quality: By minimizing reflections and crosstalk.

  • Enhanced System Reliability: Through the protection of sensitive components.

  • Efficient Network Design: Allowing for more compact and versatile configurations.

Conclusion

Fiber isolators and fiber circulators are vital components in the advancement of optical communication systems. Their ability to control light propagation ensures the protection of critical components and the efficient routing of signals. As optical networks continue to evolve, the importance of these devices in maintaining system integrity and performance cannot be overstated.

Did You know?

Fiber isolators and fiber circulators are essential passive components in modern optical systems, ensuring signal integrity and enhancing performance. Fiber isolators are non-reciprocal devices that allow light to pass in only one direction, effectively preventing back-reflected light from reaching sensitive components like lasers. This protection is crucial in maintaining the stability and longevity of laser sources and optical amplifiers. On the other hand, fiber circulators are multi-port devices that direct light sequentially from one port to the next, enabling bidirectional communication over a single fiber. They are instrumental in advanced applications such as Dense Wavelength Division Multiplexing (DWDM) systems, optical add-drop multiplexing, and fiber-optic sensing. Both components are vital in high-speed communication networks, ensuring efficient signal routing and minimizing interference. Their integration into optical systems leads to improved performance, reduced noise, and enhanced reliability.