To provide a method for performing phase control of coherent two light wave signals while maintaining coherence in the state of the light signal, and a device which realizes such a method, there is provided, as illustrated in FIG. 1, a phase adjustment device 1 for two light waves including: a two light wave source 3, a wavelength separator 5, a first phase modulator 7, and a second phase modulator 9, whereby coherent two light waves are used as input signals to perform wavelength separation of those input signals thereafter to control optical phases of the respective light signals thereafter to multiplex them by using a multiplexer 11, thus to be able to obtain an output signal of which optical phase has been adjusted.

A mirror device includes a mirror, an actuator tilting the mirror, a first hinge coupling the mirror to the actuator, a base, a second hinge coupling the mirror to the base, a movable comb electrode coupled to the mirror, and a fixed comb electrode fixed to the base. The actuator is controlled based on a capacitance between the movable comb electrode and the fixed comb electrode. The movable comb electrode is disposed on a portion of the mirror closer to the second hinge than to the first hinge.

A method and a controller for operating an array of variable optical retarders are disclosed. Neighboring pixels of the array of variable optical retarders are driven with disordered temporal bit sequences. An optical beam illuminating the pixels tends to integrate time-domain modulation caused by individual pixels driven in a non-coordinated or disordered fashion, which reduces the overall time-domain modulation amplitude of the optical beam.

An example optical system having an optical supply sub-system for supplying light to a photonic integrated circuit is presented. The optical supply sub-system includes a primary light source, an auxiliary light source, a first optical coupler, and a second optical coupler. The first optical coupler includes a first metal-oxide-semiconductor capacitor microring resonator (MOSCAP MRR) and the first optical coupler includes a second MOSCAP MRR. The first optical coupler is coupled to the primary light source and the photonic integrated circuit to control the propagation of the primary light to the photonic integrated circuit. The auxiliary light source may be configured to generate an auxiliary light when the primary light source malfunctions and the first MOSCAP MRR and the second MOSCAP MRR are controlled to control propagation of the auxiliary light from the auxiliary light source to the photonic integrated circuit.

An optical transmission and reception connector system includes a cable that has a plug section formed at both ends thereof so as to relay and transmit light and an interfacing module that is mounted on an electronic apparatus and that includes an insertion space into which the plug section is detachably inserted. The cable is provided with a first relay optical path and a second relay optical path. The interfacing module includes a receptacle unit in which a first internal optical terminal and a second internal optical terminal for transmitting and receiving light to and from the cable are separated from each other, an optical transmitter unit, an optical receiver unit, and a main optical transmission unit that includes a first main optical path formed between the optical transmitter unit and the first internal optical terminal so as to transmit light output from the optical transmitter unit through the first internal optical terminal and a second main optical path formed between the second internal optical terminal and the optical receiver unit so as to be separated from the first main optical path and to transmit light received from the second internal optical terminal to the optical receiver unit. The plug section of the cable is formed such that an upper part and a lower part are symmetric with respect to the center thereof without depending on the insertion direction thereof, and the cable or the receptacle unit is formed to divide or switch an optical path so as to enable transmission of light by the optical transmitter unit and reception of light by the optical receiver unit.

An annular optical shifter and a method for controlling shift, where the annular optical shifter includes: a first bent straight-through waveguide, connecting an input end and an output end of an optical signal, and configured to transmit, to the output end, the optical signal input from the input end; multiple optical delay waveguide loops, arranged transversely and parallel on two arms of the first bent straight-through waveguide, where the multiple optical delay waveguide loops are configured to temporarily store optical signals; multiple pairs of optical switches, where each pair of optical switches are configured to control on and off of an optical path that is on the two arms of the first bent straight-through waveguide and two sides of an optical delay waveguide loop corresponding to each pair of optical switches; and a controller, configured to implement shift-up or shift-down of the optical signals.

A variable optical attenuator is provided. The variable optical attenuator includes an input optical fiber, an output optical fiber, a non-attenuating, transmission-type diffracting prism and a prism positioning system. The input optical fiber, the non-attenuating, transmission-type diffracting prism and the output optical fiber are optically arranged such that an optical path from the input core of the input optical fiber to the output core of the output optical fiber passes through the non-attenuating, transmission-type diffracting prism. The non-attenuating, transmission-type diffracting prism diffracts an optical signal propagating from the input optical fiber to the output optical fiber such that an input portion of the optical path is non-linear with an output portion of the optical path. The prism positioning system changes a pose of the non-attenuating, transmission-type diffracting prism within the optical path thereby attenuating the optical signal.

A method and a controller for operating an array of variable optical retarders are disclosed. Neighboring pixels of the array of variable optical retarders are driven with disordered temporal bit sequences. An optical beam illuminating the pixels tends to integrate time-domain modulation caused by individual pixels driven in a non-coordinated or disordered fashion, which reduces the overall time-domain modulation amplitude of the optical beam.

A variable optical attenuator is provided. The variable optical attenuator includes an input optical fiber, an output optical fiber, a non-attenuating, transmission-type diffracting prism and a prism positioning system. The input optical fiber, the non-attenuating, transmission-type diffracting prism and the output optical fiber are optically arranged such that an optical path from the input core of the input optical fiber to the output core of the output optical fiber passes through the non-attenuating, transmission-type diffracting prism. The non-attenuating, transmission-type diffracting prism diffracts an optical signal propagating from the input optical fiber to the output optical fiber such that an input portion of the optical path is non-linear with an output portion of the optical path. The prism positioning system changes a pose of the non-attenuating, transmission-type diffracting prism within the optical path thereby attenuating the optical signal.

An optical transmission and reception connector system includes a cable that has a plug section formed at both ends thereof so as to relay and transmit light and an interfacing module that is mounted on an electronic apparatus and that includes an insertion space into which the plug section is detachably inserted. The cable is provided with a first relay optical path and a second relay optical path. The interfacing module includes a receptacle unit in which a first internal optical terminal and a second internal optical terminal for transmitting and receiving light to and from the cable are separated from each other, an optical transmitter unit, an optical receiver unit, and a main optical transmission unit that includes a first main optical path formed between the optical transmitter unit and the first internal optical terminal so as to transmit light output from the optical transmitter unit through the first internal optical terminal and a second main optical path formed between the second internal optical terminal and the optical receiver unit so as to be separated from the first main optical path and to transmit light received from the second internal optical terminal to the optical receiver unit The plug section of the cable is formed such that an upper part and a lower part are symmetric with respect to the center thereof without depending on the insertion direction thereof, and the cable or the receptacle unit is formed to divide or switch an optical path so as to enable transmission of light by the optical transmitter unit and reception of light by the optical receiver unit.