Resources Contact Us Home
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
Cordless hand blender
Register files for a digital signal processor operating in an interleaved multi-threaded environment
Systems and methods for picture based communication
Automated synchronization of design features in disparate code components using type differencing
Carbon blacks having low PAH amounts and methods of making same
Hypallergenic mosaic antigens and methods of making same
Method for detecting directions of regularity in a two-dimensional image
  Randomly Featured Patents
Molding die set and mold package
Method for producing polyether alcohols
Therapeutic targeting of escort proteins
Method, apparatus, and computer program product for searching structured document
Convertible roller footwear
Adjusting processor clock information using a clock drift estimate
Non-stretch bending of sheet material to form cyclically variable cross-section members
Compiler optimization through combining of memory operations
Arc welding circuit for welding thin metal pieces
Apparatus and methods for communicating using symbol-modulated subcarriers