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 of transmitting data using spatial multiplexing
Spin transition material
Method for designing sunlight-reflection and heat-radiation multilayer film
Method, apparatus and computer program product for visualizing whole streets based on imagery generated from panoramic street views
Writing implement
Apparatus, method and program for image receipt, processing, conversion, and delivery to and from a plurality of external apparatuses
Prevention and treatment of oxidative stress disorders by gluthathione and phase II detoxification enzymes
  Randomly Featured Patents
Smoke stack air washer
Swiveling window mount
Attachment system for light-conducting fibers
Dane salt and process for preparing aminopenicillins therefrom
Guard rail post
Integrated circuit device with low capacitance and high thermal conductivity interface
Apparatus for the continuous production of ethanol from cereals
Methods and apparatus for processing mixtures of liquids and solids
Method for making pure beta silicon carbide
Blue dye mixture for thermal color proofing