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
Method and system for controlled media sharing in a network
Call admission control method and system
Solid-state imaging device, method for manufacturing solid-state imaging device, and electronic apparatus
Evaluation compiler method
Reception system including a mechanism countering pulsed interference
Sample holder and method for treating sample material
Di and tri- substituted oxathiazine derivatives, method for the production, method for the production thereof, use thereof as medicine and drug containing said derivatives and use thereof
  Randomly Featured Patents
Low viscosity silicone foam compositions
Programmable frequency converting filter
Adjustable soldering iron holder
Apparatus and method for converting static memory address to memory address pulse
Extra-oral dental restoration
Panels of controllable radiation transmissivity
Pneumatic radial tire reinforced with fibrillated sea-island short polymer fibers
Temperature sensor for a warming blanket
Lithographic apparatus and device manufacturing method utilizing substrate stage compensating