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Description

Faraday Rotators and Mirrors – Pigtail Style

Faraday Rotators and Mirrors in pigtail style are essential optical components designed to manipulate the polarization state of light within fiber optic systems. These devices are engineered to provide precise polarization rotation, typically by 45 degrees, making them invaluable in applications where polarization control and stability are critical. The pigtail configuration ensures easy integration with singlemode, multimode, or polarization-maintaining fibers, catering to a wide range of photonic setups.

The core function of a Faraday rotator is to rotate the polarization of incoming light by a fixed angle, independent of the direction of light propagation. When paired with a mirror, the system acts as a Faraday mirror, effectively rotating the polarization by 90 degrees upon reflection and reversing its handedness. This unique property is particularly beneficial in interferometric systems, such as fiber optic sensors and optical coherence tomography (OCT), where it compensates for polarization changes induced by fiber birefringence, thus enhancing measurement accuracy and system stability.

These miniature Faraday rotator and mirror packages are available for a broad spectrum of center wavelengths, including 633–850 nm, 980–1064 nm, and 1300–1550 nm, making them suitable for diverse applications such as fiber lasers, amplifiers, circulators, and advanced sensing systems. The compact housing design allows for seamless integration into space-constrained environments, while the low insertion loss and high return loss ensure minimal signal degradation and optimal performance. The devices maintain a high polarization extinction ratio, especially when used with polarization-maintaining fibers, supporting demanding applications that require precise polarization control.

With robust construction and reliable performance across various wavelengths, these pigtail-style Faraday rotators and mirrors are a trusted choice for researchers and engineers seeking to enhance the functionality and reliability of their fiber optic systems. Their versatility and precision make them a staple in both laboratory and industrial photonics environments.

Faraday Rotators and Mirrors - Pigtail Style

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Specifications

Center Wavelength: 1550 nm
Operating Bandwidth: 1064 nm
Insertion Loss (max): 0.75 dB
Faraday Rotation Angle (single Pass): 45 deg deg
Center Wavelength: 633-850 nm, 980-1064 nm, 1310-1550 nm & 1064 nm
Insertion Loss (Typical): 0.8 dB (633-850 nm, 980-1064 nm), 0.6 dB (1310-1550 nm & 1064 nm), 0.5 dB (Faraday Mirror 1310-1550 nm & 1064 nm)
Insertion Loss (Maximum): 1.0 dB (633-850 nm, 980-1064 nm), 0.8 dB (1310-1550 nm & 1064 nm), 0.75 dB (Faraday Mirror 1310-1550 nm & 1064 nm)
Low Loss: 0.6 dB (1310-1550 nm & 1064 nm), 0.5 dB (Faraday Mirror 1310-1550 nm & 1064 nm)
Return Loss: 40 dB (633-850 nm, 980-1064 nm), 40/60 dB (1310-1550 nm & 1064 nm, Faraday Mirror 1310-1550 nm & 1064 nm)
Polarization Extinction Ratio: 20 dB (633-850 nm, 980-1064 nm), 20/25/30 dB (1310-1550 nm & 1064 nm), 20 dB (Faraday Mirror 1310-1550 nm & 1064 nm)
Rotation Angle: 45 degrees
Rotation Tolerance: ±3 degrees (all), ±1 degree (Faraday Mirror 1310-1550 nm & 1064 nm)
Package Diameter: 5.5 mm (0.216 in)
Package Length: 40 mm (1.575 in)
Housing Type: Compact, pigtail style

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Features

  • Wide Wavelength Range: Available for center wavelengths of 633–850 nm, 980–1064 nm, and 1300–1550 nm, supporting a broad spectrum of photonics applications.
  • Multiple Fiber Types: Offered in singlemode, multimode, and polarization maintaining fiber versions for maximum compatibility.
  • Low Insertion Loss: Typical insertion loss as low as 0.5 dB (maximum 1.0 dB), ensuring minimal signal attenuation.
  • High Return Loss: Return loss up to 60 dB for superior suppression of back reflections, critical for high-performance optical systems.
  • High Polarization Extinction Ratio: Extinction ratios up to 30 dB (with PM fiber), providing excellent polarization control.
  • Precise Rotation Angle: Delivers a 45° polarization rotation (±3° tolerance, ±1° for select models) at the center wavelength for accurate polarization management.
  • Compact Miniature Design: Space-saving, robust housing ideal for integration into dense optical setups and OEM applications.
  • High Power Handling: Special high-power versions available for demanding laser and amplifier systems.
  • Pigtail Style Packaging: Convenient fiber pigtail configuration for easy splicing and integration into existing fiber networks.
  • Low Back Reflection: Engineered to minimize unwanted reflections, enhancing system stability and performance.
  • Faraday Mirror Option: Integrated Faraday mirror packages provide 90° polarization rotation and orthogonal polarization return, ideal for interferometric and sensing applications.
  • Versatile Applications: Perfect for use in fiber lasers, interferometers, optical amplifiers, circulators, and OCT systems.
  • Customizable Solutions: Custom center wavelengths, fiber types, and connector options available upon request.
  • Reliable Performance: Designed and manufactured by OZ Optics, a trusted leader in fiber optic components.

Applications

  • Fiber Lasers
    Faraday rotators and mirrors are essential in fiber laser systems to manage polarization, suppress feedback, and enhance laser stability and performance.
  • Optical Coherence Tomography (OCT) Systems
    Used in OCT imaging to maintain polarization integrity, improve signal-to-noise ratio, and enable high-resolution biomedical imaging.
  • Interferometric Sensors
    Critical for fiber optic interferometers, these devices compensate for polarization changes, ensuring accurate phase measurements in sensing applications.
  • Optical Amplifiers
    Employed in fiber amplifiers (such as EDFA and YDFA) to control polarization effects, reduce noise, and optimize amplification efficiency.
  • Optical Circulators
    Integrated into circulator designs to direct light paths and manage polarization, enabling efficient signal routing in optical networks.
  • Quantum Communication Systems
    Used to preserve polarization states and minimize errors in quantum key distribution and other quantum optics experiments.
  • Telecommunications Networks
    Enhance signal integrity and reduce polarization mode dispersion in high-speed fiber optic communication links.
  • Polarization Control and Management
    Essential for systems requiring precise polarization control, such as polarization-maintaining fiber networks and polarization-sensitive measurements.
  • Optical Isolators
    Serve as key components in isolators to prevent back reflections and protect sensitive laser sources.
  • Laser Measurement and Metrology
    Used in precision measurement setups to ensure stable polarization states and accurate optical measurements.
  • Fiber Optic Gyroscopes
    Improve the accuracy and reliability of fiber optic gyroscopes by compensating for polarization fluctuations.
  • Research and Development
    Widely used in photonics research labs for experiments involving polarization rotation, reflection, and compensation.

Frequently Asked Questions

What is a Faraday rotator and how does it work?
A Faraday rotator is an optical device that rotates the polarization state of light passing through it by a fixed angle, typically 45 degrees. It operates based on the Faraday effect, where the polarization plane of light is rotated when it passes through a material in the presence of a magnetic field. When combined with a mirror (Faraday mirror), the reflected light undergoes an additional 45-degree rotation, resulting in a total rotation of 90 degrees and a reversal of polarization handedness. This property is especially useful in fiber optic systems to compensate for polarization changes.
What are the main applications of pigtail style Faraday rotators and mirrors?
Pigtail style Faraday rotators and mirrors are commonly used in fiber lasers, interferometer sensors, optical amplifiers, circulators, and optical coherence tomography (OCT) systems. Their ability to manage and correct polarization changes makes them essential for high-precision optical measurements and communication systems.
What wavelength ranges are supported by these Faraday rotators and mirrors?
These Faraday rotators and mirrors are available for a wide range of center wavelengths, including 633-850 nm, 980-1064 nm, and 1300-1550 nm (including 1064 nm). This allows compatibility with various laser sources and fiber optic systems.
What are the typical insertion loss and return loss values for these devices?
The typical insertion loss for these Faraday rotators and mirrors ranges from 0.5 dB to 0.8 dB, with maximum values up to 1.0 dB depending on the wavelength. Return loss is typically 40 dB, with some versions offering up to 60 dB, ensuring minimal signal reflection and high performance in optical systems.
Are singlemode, multimode, and polarization maintaining versions available?
Yes, these Faraday rotators and mirrors are available in singlemode, multimode, and polarization maintaining fiber versions. This versatility allows integration into a wide variety of fiber optic setups, depending on the application's requirements.
How does a Faraday mirror differ from a standard Faraday rotator?
A Faraday mirror combines a Faraday rotator with a reflective surface. When light enters the device, it is rotated by 45 degrees, reflected, and then rotated by another 45 degrees on the return path, totaling a 90-degree rotation. The mirror also reverses the polarization handedness, making the reflected polarization orthogonal to the original. This feature is particularly useful in interferometric systems to automatically compensate for polarization changes in the fiber.
What is the polarization extinction ratio for these Faraday rotators and mirrors?
The polarization extinction ratio for these devices is typically 20 dB, with some versions offering up to 25 or 30 dB when using polarization maintaining fibers. A high extinction ratio ensures effective polarization control and minimal cross-talk in sensitive optical applications.

Got more questions? Use the inquiry form to ask the supplier directly.

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