2015-05-042015-05-042011-01-11Wysocki, Gerard and Tittel, Frank K., "Fast wavelength tuning techniques for external cavity lasers." Patent US7869474B2. issued 2011-01-11. Retrieved from https://hdl.handle.net/1911/80042.https://hdl.handle.net/1911/80042An apparatus comprising a laser source configured to emit a light beam along a first path, an optical beam steering component configured to steer the light beam from the first path to a second path at an angle to the first path, and a diffraction grating configured to reflect back at least a portion of the light beam along the second path, wherein the angle determines an external cavity length. Included is an apparatus comprising a laser source configured to emit a light beam along a first path, a beam steering component configured to redirect the light beam to a second path at an angle to the first path, wherein the optical beam steering component is configured to change the angle at a rate of at least about one Kilohertz, and a diffraction grating configured to reflect back at least a portion of the light beam along the second path.13 ppengUtility patentUS7869474B2