Patent ID: 7944958

Claim:
A light emitting device, comprising: a waveguide having an electrically pumped gain region; a saturable absorber; a coupling structure; a light-concentrating structure; a substrate; and a nonlinear medium; wherein said saturable absorber and said gain region are adapted to emit first light pulses, said coupling structure together with said light-concentrating structure being adapted to couple said first light pulses into said nonlinear medium, said nonlinear medium being adapted to generate second light pulses such that an optical frequency of said second light pulses is higher than an optical frequency of said first light pulses; said gain region, said saturable absorber, said coupling structure, and said light-concentrating structure being implemented on or in said substrate such that said coupling structure is adapted to change a direction of said first light pulses by an angle which is in the range of 70 to 110 degrees.