High Power Expanded Beam Isolator,(HP(M)EI

The high power isolator series includes in-line type, beam expanded type, fiber in and free space out type and free space type etc, which are characterized with low insertion loss, high beam quality, high isolation, high power handling, high return loss, excellent environmental stability and reliability. They are ideal products used for fiber laser and instruments applications


* High isolation and low insertion loss 

* PM and Non-PM types are available

* High Beam Quality

* Fiber can be customized


* Fiber Laser

* Fiber Sensor

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High Power Expanded Beam Isolator,HP(M)EI (doc039) .pdf




High power expanded beam   isolator, HP(M)EI

Non-PM isolator

PM isolator

Operating wavelength(nm)


Peak isolation (dB)


Isolation in band at 23(dB)


Insertion loss at 23(dB)


Polarization dependent loss (dB)



Extinction ratio (dB)


≥18(Type B),  ≥20(Type F)

Return loss (Input) (dB)


Beam Divergence @Fundamental mode (mrad)

≤0.50 (Full Angle)

Output Beam Ellipticity


Fiber type (can be customized)

HI1060, x/125, x/250, etc.

(x=10um, 15um, 20um, 30um,etc.)

PM980, PM x/125, x/250, etc.


Armored cable diameter

Φ10.5mm, cable can be customized.

Output beam diameter@1/e2 (mm)

6-8; Others on demand

Input max. power handling

Average (W)


Pulse peak(KW)


Reverse Power Handling

≤20W for 1 hour. Max

Operating Temperature ()

-5 ~ +50

Storage Temperature ()

-20 ~ +70

Dimensions (×L mm)


* Both Single cladding fiber (SCF) and double cladding fiber (DCF) are available. 

* Type B: Both axis working, Type F: Fast axis blocked.

*The default fiber length is 2.5m, protective Teflon tube length is 2.1m in a 2m Φ10.5mm Yellow Armored cable.