Abstract:
A free space optical communication system (100) and method including: several optical beam expanders (414) for receiving incoming optical signals from ground sites and neighboring satellites; several optical preamplifiers (412) for preamplifying the received optical signals; one or more optical main amplifiers (404) for amplifying the preamplified optical signals; and an optical switch (408) for directing respective amplified optical signals to respective destinations via a respective optical beam expander. The respective amplified optical signals are inputted to a respective optical beam expander (414) for transmission to said respective destinations, as outgoing optical signals.
Abstract:
In one aspect, a transparent heat exchanger (300) includes a first transparent substrate (306) optically attached to a heat source (326) like a laser amplifier, one or more fins (344) to transfer heat from the heat source (326), the one or more fins (344) comprising transparent material and further comprising one of a manifold (302) coupled to the first transparent substrate (306) or a facesheet coupled to the first transparent material. The transparent heat sink enables improved thermal performance by separating heat removal of waste heat generated by the laser amplifier and waste heat resulting from light emitted by the laser amplifier and being absorbed in the sink by its transparency. The manifold is a jet impingement cooler.
Abstract:
A slot impingement cooler (20) is formed of a plurality of sets of foils (42) in a stacked and registered array. In each set of foils (42), a first foil (44) has supply slots (56) that direct a flow of coolant, a second foil (46) has a plurality of effective light-trap cavities (62), a third foil (48) has return slots (68) that return the flow of coolant, and an optional fourth foil (50) has a plurality of effective light-trap cavities (74). The foils (44, 46, 48, 50) have registered supply manifold openings (52, 58, 64, 70) and registered return manifold openings (54, 60, 66, 72) therethrough.
Abstract:
A system for directing electromagnetic energy. The inventive system includes a first subsystem mounted on a first platform for transmitting a beam of the electromagnetic energy through a medium and a second subsystem mounted on a second platform for redirecting the beam. In accordance with the invention, the second platform is mobile relative to the first platform. In the illustrative embodiment, the beam is a high-energy laser beam. The first subsystem includes a phase conjugate mirror in optical alignment with a laser amplifier. The first subsystem further includes a beam director in optical alignment with the amplifier and a platform track sensor coupled thereto. In the illustrative embodiment, the second subsystem includes a co-aligned master oscillator, outcoupler, and target track sensor which are fixedly mounted to a stabilized platform, a beam director, and a platform track sensor. In the best mode, the stable platform is mounted for independent articulation relative to the beam director. A first alternative embodiment of the second subsystem includes first and second beam directors. The first beam director is adapted to receive the transmitted beam and the second beam director is adapted to redirect the received beam. In accordance with a second alternative embodiment, an optical fiber is provided for coupling the beam between the first platform and the second platform.