Abstract: A method for operating an optical demodulator includes receiving a double sideband suppressed carrier (“DSBSC”) optical signal. The method further includes passing the DSBSC optical signal through a Costas loop circuit. The method further includes outputting a radio frequency (“RF”) signal from a quadrature port of the Costas loop circuit.

Abstract: A method for operating an optical modulator includes receiving a narrowband radio frequency (“RF”) signal. The method further including, responsive to receiving the narrowband RF signal, modulating the narrowband RF signal using a double sideband suppressed carrier (“DSBSC”) modulation scheme to generate a DSBSC optical signal. The method further including transmitting the DSBSC optical signal to an optical transmitter.

Abstract: A method for operating an optical modulator includes receiving a narrowband radio frequency (“RF”) signal. The method further including, responsive to receiving the narrowband RF signal, modulating the narrowband RF signal using a double sideband suppressed carrier (“DSBSC”) modulation scheme to generate a DSBSC optical signal. The method further including transmitting the DSBSC optical signal to an optical transmitter.

Abstract: Technologies are described herein for a phase deviation multiplication apparatus that implements an in-place multiplication approach for multiplying the phase deviation of an input signal while maintaining the frequency of the carrier signal within a frequency band of operation. According to an embodiment, a multi-stage phase deviation multiplication apparatus includes a plurality of sequentially arranged phase deviation multipliers, including at least a first phase deviation multiplier and a last phase deviation multiplier. The phase deviation multipliers have respective predetermined phase deviation multiplication factors. The first phase deviation multiplier receives an input signal and the last phase deviation multiplier generates a last phase deviated signal. The last phase deviated signal has a phase deviation multiplication factor that is the product of the respective predetermined phase deviation multiplication factors of the plurality of phase deviation multipliers.

Abstract: A signal treating apparatus for presenting an output signal representing an input signal over a signal range includes: (a) an input section receiving the input signal and presenting a first filtered signal limited to a first bandwidth at a first circuit locus; the input section presenting a second filtered signal limited to a second bandwidth at a second circuit locus; (b) an amplifying unit receiving the first filtered signal and presenting an increased gain signal at an amplifier output locus; (c) a detector coupled with the amplifier output locus and presenting third bandwidth-limited signal limited to a third bandwidth less than the first bandwidth at a third circuit locus; and (d) a combining section coupled with the second and third circuit loci and presenting a resulting signal related with the second filtered signal and the third filtered signal; said resultant signal being said output signal.

Abstract: A photonic system and method are provided. The system includes an optical source configured to generate a carrier signal; and a modulator configured to modulate the carrier signal with a radio frequency, (“RF”) input signal to generate a modulated signal. The system also includes an optical filter configured to filter the modulated signal to generate a vestigial sideband modulated signal; and an optical detector configured to demodulate the vestigial sideband signal to generate an RF output signal. The system further includes a wavelength controller module configured to set an operating parameter of the optical source.

Abstract: A plurality of nozzles are located on each side of a foot washing station on curved portions of spray members. At least some of the nozzles are located at a plurality of elevations and are downwardly directed to knock debris off the lower leg and foot of a user to thus wash the debris away. A foot platform supports the foot or feet of a user is preferably continuously sloped so that water does not accumulate at any portion of the foot platform. Additionally, an actuator is preferably actuated by the placement of the weight of the foot on the foot platform to begin the spraying of the foot or feet with water in a hands-free operation. Spray nozzle tips are screwed into orifices which then dispense water under pressure preferably in a spray pattern with highly atomized water pellets efficiently removing debris from the feet of a user.

Abstract: An apparatus for handling an optical signal includes: an optical transmitting unit transmitting the optical signal from an input locus to an output locus. The optical transmitting unit includes a plurality of optical transmitting sections. Each respective optical transmitting section of the plurality of optical transmitting sections has a respective length and a respective attenuation gradient to establish a respective length-and-attenuation gradient configuration. Each respective optical transmitting section effects attenuation of the optical signal according to its respective length-and-attenuation gradient configuration.

Abstract: A photonic system and method are provided. The system includes an optical source configured to generate a carrier signal; and a modulator configured to modulate the carrier signal with a radio frequency, (“RF”) input signal to generate a modulated signal. The system also includes an optical filter configured to filter the modulated signal to generate a vestigial sideband modulated signal; and an optical detector configured to demodulate the vestigial sideband signal to generate an RF output signal. The system further includes a wavelength controller module configured to set an operating parameter of the optical source.

Abstract: A signal treating apparatus for presenting an output signal representing an input signal over a signal range includes: (a) an input section receiving the input signal and presenting a first filtered signal limited to a first bandwidth at a first circuit locus; the input section presenting a second filtered signal limited to a second bandwidth at a second circuit locus; (b) an amplifying unit receiving the first filtered signal and presenting an increased gain signal at an amplifier output locus; (c) a detector coupled with the amplifier output locus and presenting third bandwidth-limited signal limited to a third bandwidth less than the first bandwidth at a third circuit locus; and (d) a combining section coupled with the second and third circuit loci and presenting a resulting signal related with the second filtered signal and the third filtered signal; said resultant signal being said output signal.

Abstract: An apparatus for handling an optical signal includes: an optical transmitting unit transmitting the optical signal from an input locus to an output locus. The optical transmitting unit includes a plurality of optical transmitting sections. Each respective optical transmitting section of the plurality of optical transmitting sections has a respective length and a respective attenuation gradient to establish a respective length-and-attenuation gradient configuration. Each respective optical transmitting section effects attenuation of the optical signal according to its respective length-and-attenuation gradient configuration.

Abstract: A leg prothesis device for use as an upper leg prothesis permitting the wearer of the device to kneel thereupon comprising a first member adapted to support an upper leg prosthesis and a second member spaced from the first member adapted to support a lower leg portion connected to a foot prothesis. The first and second members are movable with respect to each other between a maximum leg angle of about 180.degree. and a minimum leg angle of about 20.degree.. A connecting member connecting the first and second members comprises three arm portions: (1) a curved portion pivotally connected at one distal end to the first member and defining a pivot axis between the first and second members; (2) a first linear portion that is integral with the curved portion; and (3) a second linear portion angularly connected to the first linear portion.

Abstract: A laser amplifier buffer arrangement for selectively switching laser energy in a double pass laser amplifier. The buffer arrangement comprises a wedge of birefringent material which angularly separates incident laser energy into polarized components, and an electro-optic polarization switch which may be selectively controlled to circularly polarize the polarization components of light passing therethrough. A plane mirror is employed to reflect the polarized components back through the switch and wedge. The wedge and switch are aligned in a manner such that an arbitrarily polarized input beam is separated into two orthogonally polarizated components that traverse separate paths through the buffer. The polarized components are reflected back through the switch and wedge by the mirror which is aligned with the normal bisecting the polarization component separation angle.