Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Athermalization and pressure desensitization of diffraction grating based spectrometer devices










Image Number 3 for United States Patent #6570652.

A device for monitoring wavelength division multiplexed optical signals for use in an optical network and in an optical performance monitor. A device has a structure for supporting components of the device. An optical component is supported at one end of the structure for transmitting the optical signals. A diffraction grating is supported at an opposing end of the structure for diffracting the optical signals from the optical component. An optical sensor is supported in relation to the diffraction grating by the structure for monitoring the optical signals. A telephoto lens assembly is supported by the structure and disposed between the optical sensor and the diffraction grating, the lens assembly having a focal length for focusing the optical signals in relation to the optical sensor. Thermal effects on the structure are balanced against thermal effects on the lens assembly. A prism is disposed between the lens assembly and diffraction grating. The prism is configured to anamorphically compress the diffracted optical signals. Thermal effects on the diffraction grating are balanced against thermal effects on the lens and prism.








 
 
  Recently Added Patents
Integrated capacitance bridge for high-resolution wide-temperature-range capacitance measurement
Alignment layer and liquid crystal display having the same
System and method for storage and retrieval of personal preference audio settings on a processor-based host
Method for transmitting and receiving data in wireless communication system
Light fitting
Purification of taxanes
Preferential loading in data centers
  Randomly Featured Patents
Mounting apparatus for processing lens blanks
Wall cabinet with shelves
Programmable time registering AC electric energy meter having electronic accumulators and display
Poker game
Personal number communication system
Thermally tolerant support structure for a catalytic combustion catalyst
Device for catheter sheath retraction
Fine pattern forming method
Fluid pressure device
Nonvolatile semiconductor memory device