PM Fiber Optic Circulator 3 Port 1064nm 1310nm 1480nm 1550nm 1650nm For EDFA Fiber Laser Fiber Sensor

  This product is a Polarization Maintaining Optical Circulator, with a standard 3-port structure (Port1→Port2, Port2→Port3 unidirectional transmission), used to isolate reflected light and achieve directional optical transmission. It supports multiple operating wavelengths: 1064 nm, 1310 nm, 1550 nm, 1650 nm, 1480 nm, etc., with typical bandwidths up to ±30 nm (1310/1550/1650 nm) and ±20/±5 nm (1064 nm model), suitable for communication C/O bands and 1 μm laser applications. The device features low insertion loss (typically 0.6–0.7 dB), high isolation (typically 30–46 dB), and high extinction ratio (≥20–22 dB), using panda-type polarization-maintaining fiber and steel tube/box packaging, suitable for integration into optical amplifiers, fiber lasers, fiber optic instruments, and sensing systems.

• Low Insertion Loss, Low System Power Loss

    In the 1310/1550 nm models, the typical insertion loss is only about 0.7 dB, and in the 1064 nm models, it is about 1.8 dB. The maximum insertion loss within the specified operating temperature range is no more than 0.9 dB / 0.8 dB / 2.1 dB, which helps maintain link OSNR and power margin, making it suitable for medium-to-long-distance and high-performance systems.

• High Isolation and Low Crosstalk, Protecting Front-End Devices

    Typical isolation reaches 46 dB (1310/1550 nm models), with minimum isolation ≥40 dB / ≥20 dB / ≥25 dB, and crosstalk ≥50 dB. This effectively blocks reflected light and crosstalk signals, preventing reflected light from flowing back to the laser, amplifier, or sensitive detector, significantly improving system stability.

• High Extinction Ratio and Excellent Polarization Characteristics

    The entire series boasts an extinction ratio of ER ≥20–22 dB, utilizing panda-type polarization-maintaining fibers such as PM1310, PM1550, and PM980. PM fiber and connector keying is aligned with the slow axis, while the fast axis is blocked. It supports both slow and fast axis applications, making it suitable for polarization-sensitive interferometry, coherent communication, and polarization-maintaining amplification systems.

• High Return Loss and High Stability

    Return loss RL ≥50 dB, maintaining stable performance within an operating temperature range of -5 to +70 ℃ (some models -5 to +50 ℃) and a storage temperature range of -40 to +85 ℃. Maximum optical power handling capacity ≤300 mW, meeting the long-term online operation requirements of most communication and laboratory scenarios.

• Flexible Selection, Covering Multiple Wavelengths and Structural Requirements

    Offering a variety of operating wavelengths (1064/1310/1480/1550/1650 nm), single/dual-stage, slow/fast axis operation, different fiber sheaths (250 μm bare fiber, 0.9 mm tube, 2.0/3.0 mm cable), and different packaging and connector combinations, customers can flexibly balance loss, isolation, installation space, and cabling methods according to their application scenarios.

• Packaging Forms
  • Steel Tube Package ST1: φ5.5 * 50 mm, suitable for 250 μm bare fiber or 0.9 mm loose tube pigtails. Its small overall size facilitates integration into modules or compact devices.
  • ABS box-type encapsulation SB: 90 * 20 * 10 mm, suitable for 2.0 mm or 3.0 mm fiber optic cables, facilitating standardized installation in rack-mounted equipment or chassis.
• Fiber Optic and Pigtail Configuration
  • Fiber Type (Panda Fiber):
    • 1310 nm: PM1310
    • 1550 nm: PM1550
    • 1064 nm: PM980
  • Sheath Type: 250 μm bare fiber, 0.9 mm loose tube, 2.0 mm / 3.0 mm cable optional
  • Standard Pigtail Length: Standard 1.0 m, customizable to project requirements
• Port Identification
  • Bare Fiber: Port1 is black, other ports are transparent (Clear) for quick identification of input ports.
  • 0.9 mm Loose Tube: All ports use a red 0.9 mm tube for uniform identification, improving neatness and readability.
• Connector and Parameter Correction
  • Optional Connectors: FC/UPC, FC/APC, SC/UPC, SC/APC, LC/UPC, LC/APC, etc.
  • For Connector-equipped Versions: Insertion Loss Increase of approximately 0.3 dB, return loss decreases by approximately 5 dB, extinction ratio decreases by approximately 2 dB; sufficient margin can be allowed when ordering based on system specifications.

• EDFA Amplifier Systems
• Fiber Optic Instruments
• Fiber Laser Systems
• Fiber Sensor Systems