Resources Contact Us Home
Multi-wavelength transmitter optical sub assembly with integrated multiplexer

Image Number 4 for United States Patent #7184621.

A four-channel multi-wavelength transmitter optical sub assembly (TOSA) with an integrated multiplexer is described that includes four lasers, four collimating lenses, a multiplexer, an isolator, a focusing lens, and an optical fiber. The integrated multiplexer comprises three filters in two stages, with each filter combining a transmission and a reflection beam into one beam. Four collimated beams are combined into one beam and then focused onto the fiber by the focusing lens. The optical paths of all channels are short and possibly the same length. The invention allows using either transistor outline (TO) can packaged lasers or lasers in chip on submount. In some embodiments, four coupling lenses that focus the light onto fiber directly can be used instead of the collimating and focusing lenses, providing a more compact assembly. One or more filters can be beam-splitters to relax coating and assembling tolerances, thus reducing the cost.

  Recently Added Patents
Bicycle shifting method
Maize variety X00C175
Error scanning in flash memory
Liquid crystal display device
Parallel active optical cable
Polymers derived from benzobis(silolothiophene) and their use as organic semiconductors
Systems and methods for determining muscle force through dynamic gain optimization of a muscle PID controller for designing a replacement prosthetic joint
  Randomly Featured Patents
Electrical connection protection unit
Collapsible support devices and structure
Apparatus, systems and methods for a thumbnail-sized scene index of media content
Methods of inhibiting locomotor damage following spinal cord injury with .alpha. D-specific antibodies
Method and system for monitoring an environment
Reciprocator and linear suspension element therefor
Corona source for producing corona discharge and fluid waste treatment with corona discharge
Techniques for super fast buffer insertion
Wire-netting baskets, basket heightening devices and the like
Pliers with biasing element