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
Reflective mask blank and method of manufacturing a reflective mask
Treatment of cancer using the sodium salt of a benzoic acid derivative
Pattern forming method using printing device and method of manufacturing liquid crystal display device using the same
Method for assisting in the checking of transaction records, transaction device, server, mobile terminal, and corresponding computer programs
Inductive antenna coupling
Method of creating animatable digital clone from multi-view images
SMS transport resource control
  Randomly Featured Patents
Elevator apparatus
Load supporting bearing plate
Methods and facilities for producing revenue from gypsum-based refuse sites
Vibratory screening machine
Protective cover for flexible joint
Electrographic stylus recording apparatus
Wavelength separation devices incorporating multi-barrier photonic heterostructures
Light shutter device
Mapping from full color to highlight color and texture
MMS brew message delivery hybridization architecture