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JP4138307B2 |
A method and apparatus for providing optical 3R regeneration involving: 1) generating an encoded optical clock signal from at least an optical signal; 2) introducing the encoded clock signal into a delay interference section of a regener...
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JP4141905B2 |
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JPWO2006093265A1 |
In the method of generating terahertz electromagnetic waves using coherent phonons in a quantum structure, coherent phonons, which are the sources of terahertz electromagnetic waves, are generated under the condition that the energy of t...
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JP4107463B2 |
In a signal demultiplexing device formed by a probe light source, a wavelength converter, and a wavelength demultiplexer, the probe light source is formed by a plurality of sub-probe light sources configured to respectively generate the ...
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JP4104999B2 |
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JP4095536B2 |
In the method of the present invention, one of each pair of photons connected through entanglement is distributed to a transmitting station, relay stations and a receiving station. After the photons reach secure sites, such as the relay ...
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JP4090707B2 |
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JP4072850B2 |
Incident signal beam pulses are transmitted by an on-state region, and an optical path for the signal beam pulses is spatially switched in an optical switch. Signal beam pulses transmitted by the on-state region of the optical switch are...
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JP4073190B2 |
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JP4072053B2 |
A frequency synthesiser for generating wideband signals for zero Hz up to frequencies in the millimetre wave band provides the ability for arbitrarily fine increments in output frequency. The synthesiser has an optical comb generator tha...
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JP4066379B2 |
An optical control type phased array antenna includes a laser generating means for generating light of single wavelength, an optical path branching means for branching the light emitted from the laser generatingmeans into first and secon...
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JP4068438B2 |
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JP4066588B2 |
Because the phase comparison of the light signal data row and the light clock signal, and the coding of the light signal by the light signal, are simultaneously conducted, the influence of the phase variation in the signal path is not af...
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JP4069036B2 |
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JP4052578B2 |
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JP4051324B2 |
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JP4047224B2 |
With a single laser light source, the line width of a beat signal is set to a few tens of kHz or less without it fluctuating over time, and the frequency thereof is set as desired. CW light from a CW laser light source (16) is input into...
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JP4047099B2 |
An object of the present invention is to provide a separating apparatus having a simple configuration, capable of time division separating time division multiplexed signal light directly and stably. To this end, the present invention is ...
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JP4041882B2 |
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JP4044271B2 |
A signal light pulse and a reference ultra-short light pulse each having an appropriate spatially lateral width are launched simultaneously into an ultra-high-speed optical memory element from both sides of an optical axis thereof at app...
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JP2008017443A |
To provide an optical signal demodulator with a simple configuration for extracting a phase change as a strength change.The demodulator capable of operating an optical signal comprising a plurality of symbols includes a 1m optical couple...
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JP4038159B2 |
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JP2008010816A |
To provide a semiconductor light-emitting element and manufacturing method thereof in which laser light of a desired wavelength in green or the like can be emitted without reducing hole and electron injection efficiency.The present inven...
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JP4032708B2 |
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JP4029515B2 |
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JP4026601B2 |
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JP4028191B2 |
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JP4026389B2 |
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JP2007328044A |
To rapidly measure an optical frequency with high resolution. An interference frequency Δν1between a first laser beam L1emitted from a laser light source 11 and a second laser beam L2emitted from a variable optical frequency laser ligh...
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JP4015724B2 |
The method involves supplying an information wave (20) to a reception telescope (21). Light from a local laser (24) is superimposed onto the information wave (20). After this mixing, the information light (20) is divided by a beam splitt...
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JP4011509B2 |
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JP4006527B2 |
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JP4002917B2 |
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JP4004720B2 |
A signal having a low frequency fm is superposed on a signal having a high frequency f1. The light having the frequency fs is modulated and transmitted to a transmission line as a wavelength dispersion measurement light. A local oscillat...
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JP3999480B2 |
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JP4000372B2 |
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JP4001825B2 |
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JP3996815B2 |
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JP3996843B2 |
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JP2007266738A |
To facilitate detection of disturbance such as eavesdropping by raising the S/N ratio in homodyne detection. The quantum cryptographic communication apparatus 100A comprises a transmitter side terminal 1, a receiver side terminal 2, and ...
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JP3987447B2 |
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JP3989627B2 |
Disclosed herein is a device including first and second optical couplers and a loop optical path. The first optical coupler includes first and second optical paths directionally coupled to each other. The loop optical path includes an op...
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JP3989374B2 |
An optical control device capable of controlling an optical signal with another optical signal, wherein a first laser light L1 of a wavelength lambda 1 and a second laser light L2 of a wavelength lambda 2 are coupled together by a first ...
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JP2007256365A |
To provide an optical frequency comb generation device for obtaining an optical comb of high S/N ratio. Pulse laser light output by synchronous mode laser oscillation of a laser light source 10 is optically amplified into a high power by...
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JP2007528173A |
An optical modulation converter ( 10 ) for converting the modulation format of an optical input signal is characterized by a birefringent medium ( 14 ), polarization maintaining fibre, with a selected differential group delay between its...
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JP3981944B2 |
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JP3979108B2 |
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JP3979047B2 |
An optical pulse code recognition device and an optical distributor recognize multiple bits of a 1 Tbps packet signal as they are, all at one time. A serial signal light emitted from an optical fiber is collimated by a lens and applied o...
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JP3976756B2 |
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JP3978645B2 |
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