Monolithic integrated optical amplifier and photodetector

Details Monolithic integrated optical amplifier and photodetector Monolithic integrated optical amplifier and photodetector

H - Electricity

01

S

H01S 3/02 (2006.01) G02B 6/12 (2006.01) H01S 3/06 (2006.01) H01S 5/50 (2006.01) H04B 10/12 (2006.01) H01S 5/026 (2006.01)

Patent

CA 2041706

An optical amplifier and photodetector are monolithically integrated, with the photodetector being optically coupled to the optical amplifier through a low radiative loss and low back reflectivity branching waveguide. Because of the low reflectivity, the branching waveguide, although having a truncated wedge tip, is able to redirect a small portion of optical radiation from the amplifier to the photodetector without deleteriously effecting the performance of the optical amplifier. The branching waveguide is realized by employing between the branches of the waveguide, a junction region having a gradual decrease in effective refractive index such as to decrease the difference between the refractive indices at the optical interface of the truncated wedge tip as seen by optical radiation incident thereto from the optical amplifier.

L'invention est un amplificateur optique et un photodétecteur intégrés monolithiquement, ce photodétecteur étant couplé optiquement à l'amplificateur optique par un guide de branchement à faible perte de rayonnement et à faible réflectivité. En raison de sa faible réflectivité, le guide de branchement, malgré son extrémité triangulaire tronquée, peut rediriger une petite partie du rayonnement lumineux de l'amplificateur au photodétecteur sans vraiment nuire à la performance de l'amplificateur optique. Ce guide de branchement est construit en montant entre les branches une région de jonction où l'indice de réfraction diminue graduellement pour réduire la différence entre les indices de réfraction à l'interface optique de l'extrémité triangulaire tronquée telle que perçue par le rayonnement lumineux incident provenant de l'amplificateur optique.

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