Ruik's pm circulator is one type of product, allowing the light to transmit through the route established, from port 1 to port 2, and from port 2 to port 3, blocking the reversed. PM Fiber Circulator (Fast axis blocked) Features Applications Low Insertion Loss EDFA & Raman Amplifier High Return Loss Fiber Sensor High Isolation Fiber Instrument High Extinction Ratio High Reliability& Stability Specifications Parameter Unit Value Type Type A Type B Port Type - 3 Port 4 Port 3 Port 4 Port 3 Port 4Port Center Wavelength 1310 or 1550nm 1310 or 1550nm 1064nm Operating Wavelength Range ±20nm ±20nm ±5nm Typ. Insertion Loss at 23 0.7dB 1.1dB 0.6dB 1.0dB 1.8dB 2.2dB Max. Insertion Loss at 230.9dB 1.3dB 0.8dB 1.2dB 2.1dB 2.5dB Typ. Peak Isolation 23 46dB 30dB 30dB Min. Isolation at 23 40dB 20dB 25dB Min. Extinction Ratio at 23 22dB 20dB 20dB Min. Cross Talk 50dB Min. Return Loss 50dB Max. Optical Power(CW) 300mW Max. Tensile Load 5N Operating Temperature -5~+70 Storage Temperature -40~+85 For device with connector, IL is 0.3dB higher, RL is 5dB lower, ER is 2dB lower. The default connector key is aligned to slow axis. Company introduction: RUIK-Tech Communication is a manufacturer and supplier of Optical Passive Components with ISO9001:2015 certified. We design advanced and cost-effective passive components for various industries which include Fiber Laser, Sensing Applications, CATV, Telecommunication, Medical Systems, Gyroscope, etc. Our main products include High Power Components up to 100W (20kW), Polarization Maintaining (PM) and Single-mode Fiber Components with ranging from 780nm to 2000nm. We also provide Customized components for our customers. High power Optical Fiber Components: -Optical Fiber Isolator, up to 100W; -Free Space Isolator, up to 100W; -Optical Circulator, up to 30W; -Pump Laser Protector; -Band Pass Filter; -Nx1 Pump Combiner; -Cladding Power Stripper; -Mode Field Adapter; -(N+1)x1 Pump & Signal Combiner, 200W/port; Polarization Maintaining Fiber Components: -In-Line Polarizer/Depolarizer; -In-Line Faraday Isolator; -Optical Circulator; -Fused WDM / Coupler; -Filter WDM / Coupler; -Fiber DWDM -Fiber Mirror; -Faraday Rotator; -Fiber Patchcord / Jumper; -PLC Splitter Module; -Tap / WDM / Isolator Hybrid; Manual Variable Optical Attenuator; -1x2 Polarization Beam Splitter / Combiner (PBS/C) -1x2 Isolator & Polarization Beam Splitter / Combiner (IPBS/C)