Semiconductor laser with integral spatial mode filter

  • US 5,392,308 A
  • Filed: 01/07/1993
  • Issued: 02/21/1995
  • Est. Priority Date: 01/07/1993
  • Status: Expired due to Term
First Claim
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1. A coherent light source comprisinga semiconductor light amplifying chip having an active medium, said active medium including a gain region permitting propagation of light with a diverging phase front therein,excitation means for pumping said active medium, andan optical resonator, said active medium being located at least partially within a resonant cavity defined by said resonator and said medium, said resonant cavity having a single-spatial-mode filter therein, at least one reflector of said resonator being an external reflector such that a portion of said resonant cavity lies outside of said chip a second reflector of said resonator positioned such that said light propagating with said diverging phase front is incident thereon, light reflected by said second reflector back toward said single-spatial-mode filter also having a diverging phase front.

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