Highly temperature stable filter for fiberoptic applications and system for altering the wavelength or other characteristics of optical devices
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United States of America Patent
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Jul 31, 2001
Grant Date -
N/A
app pub date -
Oct 10, 1997
filing date -
Oct 10, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The optical thickness of an optical device such as an interference filter or optical isolator is altered by applying stress thereto. This changes the frequency or isolation characteristics of the filter or isolator. The two sides of the device may be clamped to a member having a temperature expansion coefficient which is different from that of the device in order to apply tension or compression to the device in response to temperature changes. In this manner, the shifts in optical characteristics of the device due to temperature change is at least partially cancelled by the shifts in optical characteristics induced by stress applied by the member.
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