Abstract: Systems and methods for generating infrared radiation are provided. The systems and methods may generate, via one or more pump sources, one or more pump beams. The one or more pump beams may define a single beamline. The systems and methods may further generate, via a nonlinear optical converter, a first signal wavelength, a first idler wavelength, a second signal wavelength, and a second idler wavelength based, at least in part, on the one or more pump beams. The first signal wavelength and the first idler wavelength may be independently variable from the second signal wavelength and the second idler wavelength. The systems and methods may further output, via the nonlinear optical converter, a mid-wave infrared (MWIR) beam including three or more wavelengths in the single beamline.

Abstract: A system and method are disclosed for a precision variable-focus telescope that includes a telescope housing containing an optical system; a gap pad including a first side and a second side, wherein the first side of the gap pad is attached to the telescope housing; a heat spreader including a first side and a second side, wherein the heat spreader is contiguous with the telescope housing and wherein the second side of the heat spreader is attached to the second side of the gap pad; a temperature-sensing device connected to the first side of the heat spreader; and an electric-film heater including a first side and a second side, wherein the second side of the electric-film heater is attached to the first side of the heat spreader.

Abstract: A wavelength-tunable, injection-seeded, dispersion-compensated, dispersively-pumped solid state laser includes a lasing medium; a highly reflective mirror; an output coupler; at least one isosceles Brewster prism oriented to the minimum deviation angle between the medium and the mirror for directing light of different wavelengths along different paths; means for varying the angle of the highly reflective mirror relative to the light from at least one Brewster angle for selecting a predetermined laser operating wavelength; a dispersion compensation apparatus associated with the lasing medium; a laser injection seeding port disposed between the dispersion compensation apparatus and one of the mirror and coupler and including a reflective surface at an acute non-Brewster angle to the laser beam for introducing a seed input; a dispersion compensation apparatus associated with the laser medium including opposite chirality optical elements; the lasing medium including a pump surface disposed at an acute angle to th

Abstract: An optical element includes an ogival reflective surface which diverges an incident radiant energy beam substantially uniformly into a 2.pi. solid angle. The precise shape of the reflective surface is defined mathematically in relation to the desired solid angle of divergence and energy distribution of the incident beam. To facilitate mounting and alignment of the reflective surface in an optical system, it is formed internally of a body of optically transmissive material. The external surface of the transmissive body is shaped so as to provide normal incidence for rays reflected from the reflective surface. The element may be used as a beam diverger, or alternatively in reverse, to converge and collimate radiation.

Abstract: Sensing of acoustic waves is achieved by providing spaced apart stationary and cantilevered optic fibers whereby inertial forces created by acoustic signals modulate an optical signal carried by the fibers through vibration of the cantilevered fiber.

Abstract: A fiber optic angular accelerometer is provided by employing a flexible membrane having an optical fiber attached thereto, an input optical fiber for coupling light to the fiber attached to the flexible membrane and an output optical fiber for receiving light from the optical fiber attached to the flexible membrane whereby angular accelerations will occasion flexing of the flexible membrane and cause the optical fiber attached thereto to pivot about the point of attachment and occasion a change in light transmitted between the input and output optical fibers.

Abstract: A magnetometer which includes a pair of spaced apart optical fibers at least one of which comprises a cantilevered beam having a dipolar magnet thereon such that fluctuations of the magnetic H field will cause fluctuating mechanical torque on the magnet which will be applied to the cantilevered optical fiber to deflect same and occasion modulation of an optical signal transmitted between the two fibers.