Monolithic QW laser beam steering and wavelength tunability
We demonstrate a monolithic tunable laser on a QW structure by integrating an optical beam steering section with an area-selectively intermixed QW gain section. Wavelength switching is achieved by steering the laser beam over an optical gain medium that consists of two laterally adjacent quantum well regions selectively intermixed to varying extents. The device output had a total of 10nm wavelength tuning that was controlled by injecting separate electrical current values to each of the steering contacts and the amplifier contact.
tunable lasers quantum well lasers semiconductor lasers diodes quantum wells intermixing current induced guiding