Faraday Mirror Components for Fiber Optic Systems

1064nm Faraday Mirror

1064nm Faraday Mirror

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Sold by: DK Photonics Ships from: China
Specifications
Center Wavelength: 1064 nm
Operating Bandwidth: 30 nm
Insertion Loss (max): 5 dB
Faraday Rotation Angle (single Pass): 45 deg deg
Operating Bandwidth: ±5 nm
Ascentta Faraday Rotator Mirror (1310nm, 1480nm, 1550nm)

Ascentta Faraday Rotator Mirror (1310nm, 1480nm, 1550nm)

$120.00
Sold by: Ascentta Ships from: United States
Specifications
Operating Bandwidth: 60 nm
Insertion Loss (max): 0.6 dB
Faraday Rotation Angle (single Pass): 45 deg deg
Wavelength: 1310±30, or 1480±30, or 1550±30 nm
Faraday Rotation Angle (Single Pass): 45 Degree
1480nm Faraday Mirror

1480nm Faraday Mirror

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Sold by: DK Photonics Ships from: China
Specifications
Center Wavelength: 1480 nm
Operating Bandwidth: 30 nm
Insertion Loss (max): 0.6 dB
Faraday Rotation Angle (single Pass): 45 deg deg
Operating Bandwidth: ±30 nm
1550nm Faraday Mirror

1550nm Faraday Mirror

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Sold by: DK Photonics Ships from: China
Specifications
Center Wavelength: 1550 nm
Operating Bandwidth: 30 nm
Insertion Loss (max): 0.6 dB
Faraday Rotation Angle (single Pass): 45 deg deg
Faraday Rotation Angle: 45°
1950nm Faraday Mirror

1950nm Faraday Mirror

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Sold by: DK Photonics Ships from: China
Specifications
Center Wavelength: 1950 nm
Operating Bandwidth: 30 nm
Insertion Loss (max): 0.9 dB
Faraday Rotation Angle (single Pass): 45 deg deg
Operating Bandwidth: ±30 nm

Did You Know?

Faraday mirrors, also known as Faraday isolators, are optical devices used to control the polarization of light in fiber optic systems. They consist of a Faraday rotator and a polarizer, which together create a one-way light path that allows light to enter but not exit in the opposite direction, thereby preventing back-reflections and signal distortion in the fiber. The Faraday rotator is a material that rotates the polarization of light passing through it by a fixed amount, using the magneto-optic effect. This effect occurs when light passes through a magnetic field, causing its polarization to rotate. The polarizer only allows light with a specific polarization to pass through, creating a one-way path. Faraday mirrors are commonly used in telecommunications, laser systems, and optical sensing applications, where they offer benefits such as improved signal quality, increased laser stability, and the ability to detect changes in polarization caused by external magnetic fields. However, they can be relatively expensive and larger than other polarization control devices, which can make them difficult to integrate into certain optical systems. Additionally, they can be sensitive to temperature and magnetic field fluctuations, which can affect their performance.

Related Resources

Frequently Asked Questions

A Faraday mirror, also known as a Faraday isolator, is a device used to control the polarization of light in optical fiber systems. It consists of a Faraday rotator, which rotates the polarization of light passing through it, and a polarizer, which only allows light with a specific polarization to pass through. Together, these components create a one-way light path that allows light to enter but not exit in the opposite direction, which can prevent interference caused by back-reflections in the fiber.

What is a Faraday Mirror?

A Faraday Mirror is a passive fiber optic component that reflects incident light while rotating its polarization by 90°. When used with a length of optical fiber, the forward and backward propagation polarization states experience reciprocal effects that cancel, making the overall link largely polarization-insensitive. In practice, a Faraday Mirror typically combines a Faraday rotator and a high-reflectivity mirror, often integrated with a fiber pigtail.

Typical Specifications and Parameters

On FindLight you will find Faraday Mirror products designed for single-mode fiber systems across common telecom and test wavelengths. Typical parameters include:

  • Operating wavelength: Center wavelengths such as 1310 nm, 1550 nm, 1064 nm, or other specified bands, with defined bandwidth tolerances.
  • Return loss / reflectivity: High reflectivity (≈ −0.5 dB) with return loss often > 50 dB to minimize back reflections into sources.
  • Polarization rotation: Nominal 90° Faraday rotation with tight tolerance over the operating wavelength and temperature range.
  • Fiber type and pigtail: SMF-28 or specialty single-mode fibers; connectorized (FC/PC, FC/APC, SC/APC) or bare fiber pigtails.
  • Insertion loss: Typically < 0.8 dB, depending on design and connectorization.
  • Power handling: Maximum optical power rating, important for pulsed lasers and high-power CW sources.
  • Package style: Miniature in-line, bulkhead mount, or module form factors, with specified operating temperature ranges.

Use Cases for Faraday Mirror Devices

A Faraday Mirror is widely used in interferometric fiber optic gyroscopes, optical time-domain reflectometry (OTDR) setups, and coherent detection schemes to mitigate polarization-induced fading. It is also deployed in fiber sensors, delay lines, and reflective amplifiers, where stable interference patterns or gain are required regardless of input polarization fluctuations.

Buyer Guidance on FindLight

When selecting a Faraday Mirror, compare operating wavelength, insertion loss, return loss, power handling, and fiber/connector compatibility with your existing network or lab setup. Consider whether you need ruggedized packaging for field deployment or compact in-line packages for benchtop experiments. On FindLight you can review detailed datasheets for each Faraday Mirror, evaluate multiple vendors, and request quotes directly from suppliers. No registration is required to send inquiries, allowing procurement engineers and R&D teams to quickly identify suitable components and obtain pricing and lead-time information.