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JP5909154B2 |
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JP5908872B2 |
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JP5889530B2 |
An apparatus for controlling an acousto-optical component influencing at least one of illumination light and detection light in a microscope is described. The apparatus comprises a radio-frequency generator for supplying the acousto-opti...
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JP5874896B2 |
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JP5867739B2 |
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JP5836739B2 |
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JP5825354B2 |
A planar lightwave circuit includes: a substrate with a straight groove formed therein; a signal light input port which is formed in the substrate and receives signal light; a first planar filter part which is fitted into the groove and ...
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JP2015213228A |
To provide an optical receiver capable of further faster controlling a wavelength of a local oscillation light.The optical receiver includes: a local oscillation light source 1; an optical modulation section 2 for modulating a continuous...
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JP5815004B2 |
A frequency up-conversion system includes an optical splitter, an optical modulator, an optical phase-shifter, and an optical coupler. In one embodiment of the present disclosure, the optical splitter is configured to split an optical wa...
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JP5796934B2 |
A polarization diversity optical system device includes: a polarization split unit that splits a first coherent light into a first split light and a second split light whose polarization components are orthogonal to each other, and split...
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JP5794575B2 |
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JP5792086B2 |
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JP2015170916A |
To realize high accurate signal light reception performance.An optical transmission device includes: a BER monitoring part 6, for measuring a bit error rate BER of a data signal as signal quality of the data signal extracted by a digital...
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JP2015159191A |
To provide an optical transmission device arranged so that the influence of variation in amount of heat generation by a semiconductor laser element on a wavelength monitor element can be reduced.An optical transmission device 1 comprises...
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JP5773060B2 |
A planar lightwave circuit includes a substrate in which a groove being formed, the groove dividing the substrate into a first area and a second area; a first filter, a second filter, and a third filter intruded into the groove; as are f...
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JP5760581B2 |
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JP5758779B2 |
To provide an optical hybrid circuit and an optical receiver capable of obtaining stable characteristics and enhancing the degrees of freedom of design, and to provide an optical coupler that can be suitably used for the optical hybrid c...
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JP5755230B2 |
An optical coherent detector that employs an interleave-chirped arrayed waveguide grating (AWG). The AWG has a periodic chirp pattern that enables the AWG to function as an optical 90-degree hybrid. If the AWG is implemented using a bire...
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JP2015132774A |
To provide a wavelength conversion light source capable of generating light in a mid-infrared wavelength region over a wide wavelength range of 2 to 4.5 μm band.The wavelength conversion light source comprises: an optical frequency comb...
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JP5737874B2 |
In a free space optical system type demodulator of a phase shift keying signal, if a half beam splitter is used as a non-polarizing optical branching unit that is used when generating beams corresponding to I and Q channels or when multi...
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JP5724214B2 |
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JP5713501B2 |
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JP5710989B2 |
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JP5708795B2 |
In order to promptly switch a wavelength of local light in conjunction with switching of a wavelength of signal light, a coherent optical receiver includes a signal light divergence unit for causing signal light to diverge to first signa...
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JP2015075614A |
To generate a broadband optical frequency comb with a high signal-to-noise power ratio.An optical frequency comb generator includes: an optical modulator 21 that modulates continuous light from a light source; an optical filter 22 that r...
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JP5700885B2 |
Systems and methods are disclosed for a filter-less coherent receiving system with a filter-less coherent receiver frontend; a signal-signal beat-noise detector coupled to the filter-less coherent receiver frontend; and a real-time proce...
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JP5700050B2 |
In a coherent optical receiver device, the dynamic range considerably decreases in the case of selectively receiving the optical multiplexed signals by means of the wavelength of the local oscillator light, therefore, a coherent optical ...
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JP2015070360A |
To provide a transmitter, a receiver, and a coherent communication method comprising the transmitter and the receiver, employing CO-OFDM not deteriorating reception tolerance.A transmitter 100 comprises: a modulator 132 for generating an...
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JP5690991B2 |
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JP5692439B1 |
To perform frequency discrimination stably without using a digital filter. A demodulation unit that demodulates an optical phase modulation signal which is a binary phase modulation signal to generate an I-axis signal and a Q-axis signal...
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JP5684131B2 |
The invention provides a PLC-type DP-QPSK demodulator that reduces connection loss between a polarization beam splitter and a 90-degree hybrid circuit and aims at reducing the manufacturing cost and an optical transmission system using t...
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JP5675967B2 |
The invention relates to a method for generating coherent-phase light having a predefinable frequency value (νSoll), comprising the steps of generating working light with a working frequency (νSL), generating a frequency comb (10), whi...
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JP5665038B2 |
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JP5660989B2 |
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JP5652030B2 |
To provide an optical waveguide device that reduces an insertion loss and facilitates phase control with a configuration suitable for monolithic integration.An optical waveguide device includes: a multimode interference coupler that conv...
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JP5645374B2 |
In a delay line interferometer inside a demodulator, with respect to polarization states of two split beams of light to be interfered with each other, p polarization and s polarization are reversed by a half beam splitter and, further, a...
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JP5644235B2 |
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JP2014232164A |
To provide a wavelength selection filter in which losses are few and the full width at half maximum of spectral peak of transmitted light is narrow, and a wavelength variable light source in which losses are few and the full width at hal...
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JP2014220600A |
To provide a high-speed wavelength change monitor for instantaneously detecting a wavelength change with respect to light of any arbitrary wavelength outputted from a wavelength variable laser, and a light shield device for instantaneous...
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JP2014529090A |
Embodiments of the present invention are directed to a transparent up-conversion device having two transparent electrodes. In an embodiment of the invention, the up-conversion device is a layer consisting of a transparent substrate inclu...
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JP2014202913A |
To provide a differential phase modulation-signal demodulation circuit that can remarkably reduce loss of signal information due to an optical nonlinear effect of an optical waveguide by easily demodulating a signal subjected to differen...
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JP5605981B2 |
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JP5604988B2 |
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JP5598168B2 |
In an optical network system a carrier light propagates along a transmission line. A control light generator included in an optical multiplexing apparatus generates a control light obtained by modulating an intensity-modulated light by a...
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JP5598043B2 |
A 90-degree optical hybrid interferometer having an optical path length difference to a pair of the optical signal waveguide arm and the local oscillator optical waveguide arm at either the I phase side or the Q phase side at the TE opti...
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JP5598066B2 |
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JP5591689B2 |
An optical system including: a photon source; first directing elements configured to direct photons to follow a first path through the optical system; second directing elements configured to direct photons to follow a second path through...
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JP5587467B2 |
A representative optical receiver of the invention receives an optical transverse-mode-multiplexed (TMM) signal through a multimode fiber that supports a plurality of transverse modes. The optical receiver has a plurality of optical dete...
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JP5583222B2 |
A modulator with polarization marking comprising two input ports for receiving two optical signals at one wavelength, and exhibiting essentially perpendicular optical polarization states, capable of phase-modulating those signals with da...
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JPWO2012147324A1 |
To provide an optical frequency conversion method and an apparatus capable of easily extracting an output light wave of a desired frequency component by removing components other than a desired harmonic component with high accuracy even ...
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