Patent ID: 7869474
Filing Date: 2011-01-11
Classification: B82Y,G02B,H01S

Abstract:
1. An apparatus comprising: a laser source configured to emit a light beam along a first path; a first optical beam steering component configured to steer the light beam from the first path to a second path at a first angle to the first path; a second optical beam steering component located between the first optical beam steering component and the diffraction grating and configured to redirect the light beam to a third path at a second angle to the second path; and a diffraction grating configured to reflect back at least a portion of the light beam along the second path and the third path, wherein the first optical beam steering component is configured to change the angle at a first rate; wherein the second optical beam steering component is configured to change the second angle at a second rate; wherein the first angled and the second angle determine an external cavity (EC) length; and wherein none of the laser source, the optical beam steering component, and the diffraction grating are linearly translated to vary the external cavity (EC) length.