1550nm Fiber Optic Circulator 3 Port Steel Tube For PON CATV DWDM / Broadband Network

  This product is a 1550nm fiber optic circulator (Steel Tube Device), employing a 3-port structure to achieve one-way transmission from Port 1 to Port 2 and from Port 2 to Port 3, effectively isolating back-reflected light, protecting upstream components, and optimizing system optical path design. The operating wavelength is 1550 ±30 nm, with a typical insertion loss ≤0.9 dB and isolation ≥40 dB. It also features extremely low PDL and good signal consistency, making it suitable for C-band optical communication systems, amplification links, and various fiber optic instruments. The device uses SMF-28e fiber + 0.9 mm Hytrel sheath, with a 1 m pigtail length and a steel tube package size of φ5.5 * 38 mm. It defaults to an FC/APC connector, facilitating direct integration into existing platforms.

• Low Insertion Loss & Low PDL

    Operating at 1550 nm ±30 nm, the device's insertion loss is ≤0.9 dB, and polarization-dependent loss (PDL) is ≤0.15 dB, minimizing the device's impact on system power budget and OSNR, making it suitable for medium- to long-distance or high-performance links.

• High Isolation & Low Crosstalk

    Port isolation is ≥40 dB, and crosstalk is ≥50 dB, effectively suppressing backlight and crosstalk signals, preventing reflected light from returning to the laser or amplifier, and significantly improving system stability and signal quality.

• High Return Loss & Low PMD

    Return loss is ≥50 dB, and polarization mode dispersion (PDM) is ≤0.1 ps, which helps maintain signal waveform and coherence characteristics, making it particularly suitable for high-speed or precision optical applications sensitive to reflection and dispersion.

• High Channel Consistency and Reliability

    The design features excellent channel uniformity and long-term stability, meeting Telcordia specifications and RoHS requirements. With a maximum optical power carrying capacity of ≤500 mW, it is suitable for engineering and operational-grade long-term online applications.

• Easy to Identify and Install

    Ports are color-coded: Port1 red, Port2 blue, Port3 white, corresponding to "Input → Intermediate → Output," facilitating quick identification of signal direction and wiring sequence on-site and reducing the risk of incorrect connections.

• Clear Selection, Supports Single/Dual Configurations

    Order codes allow selection of Single (S) or Dual (D) configurations, as well as C/O/L bands, different fiber optic sheaths, and connector types, enabling customers to flexibly select based on loss, isolation, and system architecture.

  Steel Tube Packaging ST = φ5.5 * L38 mm, compact structure, easy to arrange and install in modules, box-type equipment, or chassis trays.

• Fiber Type: SMF-28e Single-mode Fiber
• Sheath Type: 0.9 mm Hytrel Tube (Code 09)
• Standard Pigtail Length: 1.0 m (Code 10), other lengths can be customized upon ordering according to project requirements.

• Operating Direction: Port1 → Port2, Port2 → Port3
• Port Identification: Port1 red, Port2 blue, Port3 white, for easy on-site identification and maintenance.

• Standard Configuration Example: FC/APC–FC/APC (Order Code 22)
• Optional Connectors: Connectorless, FC/UPC, FC/APC, SC/UPC, SC/APC, LC/UPC, LC/APC, etc. The last two digits of the order code distinguish the input/output connector type.

• Operating Temperature: 0～+70 ℃
• Storage Temperature: -40～+85 ℃
• Maximum Optical Power: ≤500 mW, meeting the power requirements of most communication and testing applications.

• Broadband networks
• PON networks
• CATV system
• DWDM system