Alxenses's Athermal Packaged FBG is a low-loss narrowband reflective optical filter with wavelength drift of less than 0.1nm over the temperature range of 0°C-75°C. Negative thermal expansion material was to assemble the FBG package for temperature-compensation. The athermal packaged FBG is much less temperature-sensitive than normal FBG and is suitable for applications where optical filter with high thermal stability is required. They can be used as channel filters/blockers for DWDM systems as well as wavelength references for fiber sensor systems.

Features:

• Low insertion loss
• Low polarization dependent loss
• Excellent channel isolation
• Wide temperature operation range with minimal wavelength drift

Applications:

• Channel add/drop Multiplexer for DWDM systems
• Wavelength reference
• Wavelength locking

Athermal Packaged FBG
Parameters	Values	Units	Data Sheet
Channel Spacing	50	GHz
Wavelength Range	1510~1590	nm
Reflective Bandwidth @-0.5dB	>0.2	nm
Reflective Bandwidth @-25dB	<0.6	nm
Reflective Insertion Loss	<0.2	dB
Reflective Adjacent Channel Isolation	>23	dB
Reflective Non-adjacent Channel Isolation	>26	dB
Polarization Dependent Loss	<0.1	dB
Maximum shifted Wavelength	70pm from -5~+70°C	--
Fiber Type	SMF-28 Compatible fibers	--
Package Dimension	Ф12 x 85	mm
Operating Temperature	0~+75	°C
Storage Temperature	-40~+85	°C




Thermal Characteristics:

Athermal Packaged FBG - Part Number