Micro-Optics components

Casix designs, develops and manufactures a wide range of miniature passive optical components for test and measurement equipment, optical communications networks and fiber sensor and laser applications. The current products include free-space isolators, in-line isolators, isolator+thin film filter hybrid devices.



Fiber optic amplifiers, WDM and DWDM systems, transmitters and fiber Lasers, EDFAs.


In-line isolators


General Specifications:

Parameter Value
Operating temperature -5℃ ~ +70℃
Storage temperature -40℃ ~ +85℃
Maximum optical power 500mW


Performance Specifications:

Parameter Single Stage Dual Stage Mini
Grade P Grade A Grade P Grade A Single stage Dual stage
Wavelength (nm) 1310nm, 1550nm
Min Isolation (dB) 29 26 46 46 29 45
Max IL (dB) 0.35 0.45 0.45 0.45 0.45 0.6
Max WDL (dB) 0.1 0.1 0.1 0.1 0.15 0.1
Max PDL (dB) 0.05 0.1 0.05 0.1 0.1 0.1
Min RL (dB) 60 55 60 55 55 55
Max PMD (ps) 0.05
Package (mm) 3.6x30 3.6x30 3.0x30


Free-space isolator

Parameter Single Stage FSI Dual Stage FSI
Wavelength [nm] 1310nm, 1550nm, 1590nm
Clear Aperture 0.7 mm dia. 0.9 mm dia.
Insertion Loss 0.3 dB 0.5 dB
Minimum Isolation 28 dB 45 dB
Operating Temperature 25℃ ~ 30℃
Storage Temperature -50℃ ~ 85℃
Maximum Optical Power 500mW 500mW


Hybrid devices

Hybrid device is built based on isolator and thin-film filter (TFF) to fulfill isolator and TFF functions into a compact package. Casix produces Tap+Isolator, Isolator+WDM , Tap +WDM+Isolator hybrid devices.

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