High Power Polarization Insensitive Circulator

The high power polarization insensitive circulator (polarization-idependent fiber optical circulator) is a nonreciprocal, passive 3-port device, and its key functionality is directing light signals sequentially from one port to the next sequential port which results in the separation of signals which travel along an optical fiber in opposite directions. The routing characteristics can be represented by 1 → 2, 2 → 3, i.e. port 1 is an input port only, ports 2 serve as input and output ports while port 3 is an output-only port. Lfiber can customize the high power polarization insensitive circulator according to the customers’ ordering information (at the last part of the spec sheet). Related Products ↓

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High power Polarization Insensitive Circulator (Polarization-idependent Fiber Optical Circulator)

Fiber optical circulators are made of an assembly of optical components. There are many different designs but the key operation principle is based on the Faraday effect, like that of the isolator.

Lfiber’s high power polarization insensitive circulator (polarization-idependent fiber optical circulator) is functional independent of the polarization state of a light. It is known that the state of polarization of a light is not maintained and varies during the propagation in a standard optical fiber due to the birefringence caused by the imperfection of the fiber. Therefore, the majority of fiber optical circulators used in fiber optic communication systems are designed for polarization-independent operation.

Applications of Optical Circulators

Optical circulators were originally used in telecommunication systems for increasing transmission capacity of existing networks. By using optical circulators in a bi-directional transmission system, the transmission capacity of the network can be easily doubled without the need for deploying additional fibers, which has become increasingly expensive. However, with the rapid advancement in optical communication technologies and the ready availability of low-cost and high-performance circulators, the applications of optical circulators have drastically expanded into not only the telecommunication industries but also the sensing and imaging fields. Optical circulators have become an especially important element in advanced optical networks such as DWDM networks.

High Power Polarization Insensitive Circulator

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FEATURES OF HIGH POWER POLARIZATION INSENSITIVE CIRCULATOR

High Isolation & High Return Loss
Low Insertion Loss & PDL
Optical Path Epoxy Free

APPLICATIONS OF HIGH POWER POLARIZATION INSENSITIVE CIRCULATOR

EDFA, DWDM, and OTOR
DWDM and OADM networks
Bi-directional Transmission System

Specifications of High Power Polarization Insensitive Circulator
Operating Wavelength (nm)	1550±30	C+L Band (1570±50)
Peak Isolation @23 ℃ (dB)	≥40	≥40
Isolation @23 ℃ (dB)	≥35	≥30
Insertion Loss @23 ℃ (dB)	≤1.0	≤1.0
PDL (dB)	≤0.15	≤0.20
Return Loss (dB)	≥50
PMD (ps)	≤0.1
Directivity (dB)	≥50
Power Handling (W)	1, 2, 3, 5; Others on request
Fiber Type	SMF-28e
Operating Temperature ( ℃ )	0 to +70
Storage Temperature ( ℃ )	-40 to +85
Package Dimensions (mm)	For Φ250μm bare fiber or Φ900μm loose tube	Φ5.5 × 50 (< 5W) 58 x 10 x 8 mm (>5W)
	For Φ250μm bare fiber or Φ900μm loose tube	Φ5.5 × 50 (< 5W) 58 x 10 x 8 mm (>5W)
	For Φ3mm or Φ2mm cable	90 × 20 × 9.5 mm

Notes:

The high power polarization insensitive circulator is customizable and the above specifications are subject to change without notice.
For device with connectors, IL is 0.3dB higher, RL is 5.0dB lower.
Bare fiber should not support the weight of the connector. So that if any connectors needed, for the pigtail type it’s better to choose the 900μm loose tube jacket instead of the 250μm bare fiber.
For CW high-power optical interconnection, we recommend fusion splice without connectors.
For product customization or special requirements, please contact Lfiber’s sales department for availability.

Package Dimensions & Routing Characteristics

High Power Polarization Insensitive Optical Circulator

Routing: Port 1 → Port 2, Port 2 → Port 3

Ordering Information for High Power Polarization Insensitive Circulator
Center Wavelength	Port Type	Power	Package Dimensions	Pigtail Type	Fiber Length	Connector
1550nm	3-Port	1W	Φ5.5×50 mm	Φ250μm bare fiber	0.5m	None
1570nm		2W	58×10×8 mm	Φ900μm loose tube	0.8m	FC/UPC
		3W	90×20×9.5 mm	Φ2mm cable	1.0m	FC/APC
		5W		Φ3mm cable	1.5m	SC/APC
		Custom …			2.0m	SC/UPC
					Custom …	MU
						LC/PC
						LC/APC
						E2000 APC
						E2000 PC
						ST/PC