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Diode Laser With Current-Induced Steering Using Concentric With Etched Mirrors

IP.com Disclosure Number: IPCOM000099192D
Original Publication Date: 1990-Jan-01
Included in the Prior Art Database: 2005-Mar-14
Document File: 2 page(s) / 65K

Publishing Venue

IBM

Related People

Buchmann: AUTHOR [+3]

Abstract

Spatial deflection of diode laser beams is an issue for tracking in optical data storage systems spatial addressing in optical computing systems. is a concept for lateral beam steering in a diode by current injection resulting in a lateral rotation the beam inside the laser cavity due to the change in distribution of the optical gain. The lateral rotation the beam inside the laser cavity is facilitated by the of non-planar etched mirrors with a common center of

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Diode Laser With Current-Induced Steering Using Concentric With Etched Mirrors

       Spatial deflection of diode laser beams is an issue for
tracking in optical data storage systems spatial addressing in
optical computing systems. is a concept for lateral beam steering in
a diode by current injection resulting in a lateral rotation the beam
inside the laser cavity due to the change in distribution of the
optical gain.  The lateral rotation the beam inside the laser cavity
is facilitated by the of non-planar etched mirrors with a common
center of

      Fig. 1 shows the proposed laser structure.  It is a contact
laser which uses a Fabry-Perot resonator of curved back- mirror M1
and front-minor M2 with a center of curvature M.  Due to this
resonator the angular position of the lasing mode will be by the
gain-guiding effect of the injected distribution.  In the vertical
direction, the mode defined by the dielectric structure of the active
layer 2 the cladding layers 1,3.

      In order to modify the angular position of the lasing the
multi-electrode configuration C, Cl and Cr is  The electrode Cb is
the common bottom contact of the structure.  The electrode C is
pumped independently of desired angular position of the mode and also
ensures pumping of the narrow part of the cavity.

      Beam steering is achieved by pumping the laser region the
contacts Cl and Cr at different current levels. results in a
laterally displaced optical gain profile; of the...