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
Electrode structure and its manufacturing method, and semiconductor module
Electronic badge
Bi-level switching with power packs
Event-associating software application for accessing digital media
Method and system for distributing ringback files
Workflow optimization for high throughput imaging environments
Micro-fluidic device
  Randomly Featured Patents
Gradiometer having a magnetometer which cancels background magnetic field from other magnetometers
Equipment to facilitate money transfers into bank accounts
Detergent compositions stable to chlorine separation, and agents for producing same
Security in a mobile communication system
Parts disassembling apparatus
Fe-Cr-Si based non-oriented electromagnetic steel sheet and process for producing the same
Method and apparatus for measuring the cut resistance of flexible materials
Dual emission microscope
Pretensioner in seat belt apparatus
Sealed edge joint between two metal panels