RESOURCE FOR ANALYSIS OF YEAST FUNCTIONAL GENOMICS

Not Available We propose to coherently combine the output of a tapered laser array of slightly different wavelengths using an arrayed waveguide grating. We will fabricate large mode tapered lasers with a curved or a straigh AR-coated pre-amplifier monolithically integrated with the power amplifier. The curved waveguide allows an angled input facet which effectively reduces the facet reflectivity to broadband reflectivities of order less than 1 x 104. We will then integrate a fiber Bragg grating with the pre-amplifier/power amplifier chip. This will ensure that the laser lases at a frequency governed by the fiber Bragg grating. This frequency will be largely independent of the output power of the device. It is then possible to focus the light from the tapered output end of the laser into a single mode optical fiber. The different wavelength laser outputs will then be directed on the different inputs of an arrayed waveguide grating and wavelength multiplexed creating a unique output in a single mode fiber with power equaled to the combined power of the individual lasers (minus the intrinsic loss of the multiplexer). This approach does not require phase coherence between the individual tapered laser sources. BENEFITS: High power, eye-safe, semiconductor laser sources will find bath military and commercial applications. These include communication system applications such as satellite crosslinks and line-of-sight terrestrial links as well as remote sensing applications such laser rada