This 1650nm three-port polarization-insensitive optical circulator uses SMF-28e single-mode fiber and supports optical signal transmission in the P1 to P3 directions.

2. Product Features

Parameter	Unit	Specification	Test Data
Operating Wavelength	nm	1650±5	1650±5
Insertion Loss(Port1-Port2) @1650nm, 23℃	dB	≤1.5	0.95
Insertion Loss(Port2-Port3) @1650nm, 23℃	dB	≤1.5	1.08
Isolation (Port2-Port1)@λop,25±5℃	dB	≥33	53
Isolation(Port3-Port2)@λop,25±5℃	dB	≥33	51
Return Loss(All Ports) @23℃	dB	≥45	54
Directivity(Port1-Port3) @23℃	dB	≥50	58
Power Handling	mW	500
Operating Temperature	℃	0 ~ +70
Storage Temperature	℃	-40 ~ +85
Package Dimension	mm	ɸ=5.5±0.1; L =50±1
Fiber Color	-	port1 Red, port2 Blue, port3 White
Fiber Type	-	SMF-28e
Fiber Jacket	-	900μm Loose Tube
Fiber Length	cm	100±5
Connector	-	FC/APC

3-Port Polarization-Insensitive Optical Circulator Design

Center Operating Wavelength: 1650nm
P-Class Performance Configuration, Suitable for High-Reliability Optical Systems
Insertion Loss (IL): ≤1.0dB
Isolation (ISO): >45dB, Effectively Suppressing Backlight Signals
Directivity: >60dB, Reducing Crosstalk Between Ports
Signal Transmission Direction Defined as P1 to P3
Uses SMF-28e Single-Mode Fiber
Equipped with 0.9mm White, Blue, and Red Loose Tubes for Easy Port Identification
φ5.5*L50mm Steel Tube Encapsulation, Compact Structure and Good Mechanical Stability
FC/APC Connectors at P1 and P3 Ends, Fiber Length: 50cm
FC/PC Connector at P2 End, Fiber Length: 25cm
Blister Packaging, Includes Neutral English Test Report
Customization of Connectors, Fiber Length, Tube Color, and Encapsulation Form is Supported

3. Applications:

1650nm Optical Line Monitoring System
Optical Time Domain Reflectometry Testing and Online Detection
Fiber Optic Sensing and Precision Measurement System
Optical Network Fault Location and Maintenance
Fiber Optic Laser and Amplifier Systems
Optical Passive Device Testing Platform
Bidirectional Optical Signal Isolation and Routing
Integration of Communication Equipment and Optical Instruments

1650nm 3 Port Fiber Optic Circulator Polarization Insensitive P Grade High Isolation Low Loss with FC APC and FC PC Connectors

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