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Multi-wavelength gain-coupled distributed feedback laser array with fine tunability

  • US 5,536,085 A
  • Filed: 03/30/1995
  • Issued: 07/16/1996
  • Est. Priority Date: 03/30/1995
  • Status: Expired due to Term
First Claim
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1. A multi-wavelength semiconductor laser array comprising:

  • a plurality of distributed feedback, gain coupled, ridge waveguide semiconductor laser diodeslongitudinally spaced on a common substrate, each of said laser diodes having active region capable of generating light and gain for lasing action in response to an injection current, a gain coupling grating in the active region, a buffer layer on said grating, a current confining ridge waveguide in said buffer layer, contacts on each ridge waveguide and substrate and resistive heater means associated with each laser, whereby the operational wavelength of the light generated by lasing action in each laser is a function of the width of each ridge waveguide, said operational wavelength being dynamically tunable by said resistive heater means associated with each laser.

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