Polarization Maintaining Isolator, High Power PM isolators

The high power polarization maintaining Isolator (1310nm/1550nm PM isolator) is a fiber optic component that transmits light in only one direction, thereby preventing reflected light from returning back to the source. It is built with PM Panda fibers and capable of maintaining a well-defined state of polarization (SOP) of the light. This high power polarization maintaining isolator (fiber-coupled PM isolator) can be single or double/dual stage depending on the degree of required optical isolation of the propagating light. It’s a good choice in many laser applications, since back-reflected light often have deleterious effects on the operating conditions of optical devices. Related Products ↓

More about fiber-coupled polarization maintaining (PM) isolator ...

Unless otherwise specified, this polarization maintaining isolator (fiber-coupled PM isolator) can be operating on both slow-axis and fast-axis linear polarizations; Transmitting the polarization state on slow axis in one direction and blocking the orthogonal state on fast axis in both directions is available on request.

Basics of High Power Polarization Maintaining Isolator (Fiber-Coupled PM Isolator)

As light travels along fibers and connectors, there are many opportunities for back reflection. These reflections usually happen when light passes through an interface perpendicular to the direction of light propagation. An angled interface, such as in an APC connector, significantly reduces such reflections. However, in most cases one does not have control over all the link parameters, and it is necessary to reduce the effects of any potential reflection on sensitive devices such as DFB lasers. In such cases, a high power polarization maintaining Isolator (PM isolator) may be used to reduce the amount of light reaching back to the laser.

High Power Polarization Maintaining Isolator (1310nm, 1550nm)

Polarization Maintaining Isolator Fiber Optic PM Isolators

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FEATURES OF POLARIZATION MAINTAINING ISOLATOR

Polarization Maintaining
Low Insertion Loss
High Isolation and Return Loss
High Reliability and Stability

APPLICATIONS OF POLARIZATION MAINTAINING ISOLATOR

Fiber Laser
Testing Instruments
PM Fiber Sensor
Polarization Maintaining (PM) Fiber Amplifier

Specifications of High Power Polarization Maintaining Isolator (1310nm, 1550nm)
Stage	Single-stage	Dual-stage
Center Wavelength (nm)	1310 or 1550
Operating Wavelength Range (nm)	±20
Typ. Peak Isolation at 23 ℃ (dB)	42	58
Min. Isolation at 23 ℃ (dB)	28	48
Typ. Insertion Loss at 23 ℃ (dB)	0.4	0.5
Max. Insertion Loss at 23 ℃ (dB)	0.55	0.65
Extinction Ratio at 23 ℃ (only for both axis working) (dB)	≥20
Extinction Ratio at 23 ℃ (only for fast axis blocked) (dB)	≥25
Return Loss (dB)	≥50
Max. Tensile Load (N)	5
Fiber Type	Polarization-maintaining (PM) Panda fiber
Operating Temperature ( ℃ )	-5 to +70
Storage Temperature ( ℃ )	-40 to +85

Notes:

The high power polarization maintaining isolator (1310nm/1550nm PM isolator) 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, ER is 2.0dB lower.
Unless otherwise specified, the slow axis of the fiber is aligned with the key of the PM fiber connector.
Slow axis working and fast axis blocked as standard, while operating on both the slow and fast axis available on request.
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

High Power Polarization Maintaining Isolator 1310 1550 nm PM Isolators

Maximum Optical Power Handling: 10W

Polarization Maintaining PM Optical Isolator 1310nm 1550nm High Power Fiber Isolators

Maximum Optical Power Handling: 20W

Ordering Information for High Power Polarization Maintaining Isolator (1310nm, 1550nm)
Center Wavelength	Stage	Axis Alignment	Package Dimensions	Pigtail Type	Fiber Length	Connector	Handling Power	Peak Power
1310nm	Single-stage	Slow axis working and fast axis blocked	Φ 5.5x35 mm	250μm bare fiber	0.5 meter	None	10W	10kW
1550nm	Dual-stage	Fast axis working and slow axis blocked	70x12x8 mm	900μm loose tube	0.8 meter	FC/UPC	20W	20kW
Others		Both axis working			1.0 meter	FC/APC
					1.5 meter	SC/UPC
					Specified	SC/APC
						LC/UPC
						LC/APC
						Others

About Axis Alignment of the High Power PM Fiber Optical Isolator (1310nm, 1550nm):

“Slow axis working and fast axis blocked” means that light on just the slow axis is transmitted and the fast axis light is blocked in the forward direction; Both the slow and fast axis light are blocked on the backward direction.
“Both axis working” means that both the slow and fast axis light are transmitted in the forward direction, both the slow and fast axis light are blocked in the backward direction.