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  50G FBG Filter BACK
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Features:
Accurate ITU grid
Flat top and steep slope
     response
Very low insertion loss
High channel isolation
Athermal package

Main applications:
50G Dense WDM     design
Fixed channel 50G     OADM design
Wavelength selection or
     rejection filter
  Description:
When the channel spacing getting narrower, FBG filter gains its advantages of precise center wavelength position and channel extraction capability. Broptics makes 50G FBG filter specifically for high demanding Dense WDM and Optical Add/Drop Multiplexer applications. While Thin Film filter is technically uneasy to meet 50G filter requirement, FBG filter is matured for mass production. While Array Waveguide Gratings is more economic for high channel count applications, FBG becomes the more cost effective selection. Thanks to TempSmart patent-pending athermal packaging, the temperature variation is within 0.5pm/J in the operating temperature range.
Specification 50G FBG Reflective Spectrum
Parameter 50G
Center wavelength
Center wavelength tolerance  at 25J
Reflectivity
Reflective bandwidth @-0.5dB
Reflective bandwidth @-25dB
Thermal stability from
-5J ~ 70J
Adjacent channel isolation
Non-adjacent channel isolation
C & L
<0.05 nm
 
>99.5%
>0.2 nm
<0.6 nm
<50pm
 
> 25dB
> 25dB
@
50G FBG Temperature Response
 
 
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