Multi-beam, orthogonally-polarized emitting monolithic quantum w

Details Multi-beam, orthogonally-polarized emitting monolithic quantum w Multi-beam, orthogonally-polarized emitting monolithic quantum w

1992-09-22

1995-05-02

Bovernick, Rodney B.

Coherent light generators

Particular active media

Semiconductor

372 50, 372 8, 372 27, H01S 3103, H01S 319

Patent

active

054126789

ABSTRACT:
A QW diode laser generating orthogonally polarized multiple beams. The device incorporates quantum well active regions capable of, transitions to heavy hole and light hole band edges. The heavy hole transition provides TE-mode gain, while the light hole band provides mostly TM-mode gain. By controlling the compositions and thicknesses of the active regions, both modes can be obtained in a monolithic structure. In addition, the resulting laser polarization will be very sensitive to the threshold carrier density. With an intracavity loss modulator in such a structure, the polarization can also be controlled. Other ways of causing side-by-side lasers to operate, respectively, in their TE or TM modes are also described.

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