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JP2003526794A |
The invention relates to a device for detecting the PMD of optoelectronic transmission lines. The inventive device is characterized in that it comprises a narrow-band, tunable laser, whose illumination is superimposed with the illuminati...
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JP3443810B2 |
To provide a means for executing polarization diversity by a simple optical circuit without executing intricate electric circuit processing in the case where coherent detection is executed in optical communication or optical measurement,...
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JP3444519B2 |
To provide an FM modulator to generate no deterioration of waveform in FM demodulation by removing an average value fluctuation component of a wide band FM modulation signal. A modulation signal is divided into two branches so that a mut...
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JP3444958B2 |
PURPOSE: To provide an optical COM generator capable of generating optical COM signals of a wide wavelength range and high in intensity of respective spectral lines. CONSTITUTION: A laser beam which is emitted from a wavelength stabilizi...
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JP3445481B2 |
To stabilize the polarized state of an output light pulse train caused by restraining the change of the polarized state occurring when a light pulse circulates in an optical ring circuit by making propagated light pass between a light fr...
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JP3439345B2 |
To provide a wavelength converter which efficiency converts a wavelength, decreases the wavelength chirping of an output signal and is applicable to the signal exchange between the communication channels in WDM communication and a wavele...
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JP3438770B2 |
To provide an optical digital reproducing device which reproduces an optical pulse signal with much higher reliability while keeping it as light, unnecessitates a high speed photodiode, improves reliability and reduces the cost. Signal l...
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JP3434705B2 |
To provide an injection synchronous laser oscillator which can equalize the fundamental repetitive frequency of an injected light signal pulse train to a mode synchronous frequency and eliminates the need to use a circulator. This laser ...
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JP3436335B2 |
To execute a light source sweeping with a light frequency which allows a sweep control reduced in a phase noise of light and enhanced in linearity. By paying attention to the fact that the difference frequency signal between the beat sig...
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JP3432457B2 |
To easily restore control information from an optical information signal with simple circuit constitution without a complicated information processing circuit. A wavelength variable laser is utilized as a mode synchronous laser 50 using ...
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JP2003204303A |
To detect the dispersion variation of various optical fiber transmission lines, including its sign, without dithering the wavelength of a signal light or the dispersion of a variable dispersion equalizer, using other monitoring lights or...
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JP2003198486A |
To provide bidirectional light transmission in a single wavelength in a light transmission system which transmits an optical signal with a passive optical fiber transmission line through the use of light transmitter and a plurality of li...
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JP3421341B2 |
A non-linear semiconductor optical device includes an active waveguide with a multiple quantum well construction in the active region. The device is supplied with a drive current at the material transparency current with respect to an op...
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JP3419993B2 |
To provide an ideal optical frequency shifter which has neither polarization dependency of loss nor polarization mode dispersion, and also provide a wavelength multiple optical soliton transmission system which has very large capacity by...
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JP2003172959A |
To eliminate an unevenness of luminance, and to manufacture a large screen for a picture display device with an upconversion system.Two or more exciting light rays are introduced from a direction which is almost orthogonal to a panel sur...
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JP3416353B2 |
To provide a device and a method for correcting dispersion of a chromatic dispersion, which is led by converting the optical signal. This device has a non-linear converting medium (optical phase conjugator 20) arranged inside an optical ...
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JP3415832B2 |
To suppress leakage of a microwave and to obtain a high efficiency without making an optical modulator and an optical frequency comb generator large-sized by adopting a structure such that they are stored in a cavity microwave resonator ...
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JP3412925B2 |
PURPOSE: To execute optical frequency modulation without deterioration in the shape and wave front of a laser beam. CONSTITUTION: An optical system 6 for image transfer is installed between a laser device 1 and an electro-optical crystal...
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JP2003152685A |
To provide a method for optically loading a plurality of optical loading channels to a wavelength division multiplexing optical transmission system, an optical loading channel transmitter, a WDM optical transmitter and an optical transmi...
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JP2003149696A |
To provide an optical wavelength converter which is fast, safe and efficient with a simple constitution to be used in an optical communication field.The optical wavelength converter consists of a modulation signal generator 12 for genera...
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JP2003149612A |
To provide a small optical encoder and an optical decoder in which code is variable.This optical encoder 100 is provided with an optical circulator 110 and an optical component 120. The optical circulator 110 has a first port 111, a seco...
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JP2003143077A |
To increase transmission distance with low consumption power, in a bidirectional optical transmission system, where a down CW light of constant intensity transmitted from station side equipment is modulated and returned as an up signal t...
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JP3404528B2 |
To provide a light frequency converter by multiple modulation capable of easily providing higher-order side band waves from a radio-frequency electric signal of a small amplitude, compared with a configuration using conventional phase mo...
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JP2003110533A |
To deal with a high speed response in an optical signal processor to be utilized for long-distance and large-capacitance optical communication or the like.This processor is provided with a first light transmitting means 22 for transmitti...
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JP2003107542A |
To provide an apparatus and method for providing dispersion compensation for chromatic dispersion introduced in the signal conversion of an optical signal.The apparatus includes a nonlinear conversion medium arranged within an optical si...
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JP2003512638A |
A method and apparatus for optical frequency modulation discrimination. An optical beam is split into a first optical beam and a second optical beam A first photodetector is provided, the first photodetector providing a first current res...
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JP3391267B2 |
To prevent a fully optical switch from deteriorating in extinction ratio. The fully optical switch transmits or cuts off 2nd light having 2nd wavelength in synchronism with 1st input light having 1st wavelength and outputs it as output l...
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JP2003083809A |
To provide an inexpensive infrared visible conversion member and an infrared detection device having sufficiently high visible light generation intensity and resolution when converting an infrared ray into visible light.This infrared vis...
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JP2003510960A |
(57) [Summary] A method of encoding control information on an optical data signal transmitted over an optical network, in which a light source that produces a nearly coherent continuous wave optical beam is operated and the optical beam ...
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JP2003510775A |
A radiation source comprising a frequency conversion member ( 1 ) configured to emit a beam of emitted radiation ( 7 ) with at least one frequency in the range from 0.1 THz to 100 THz, in response to irradiation with an input beam ( 3 ) ...
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JP2003510664A |
A semiconductor tunable laser (10) and an interferometer (12) coupled to the tunable laser (10) are monolithically fabricated in a semiconductor heterostructure. The laser also comprises a buried ridge stripe waveguide laser. The interfe...
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JP2003509886A |
A method and apparatus for generating microwave signal frequencies. An incident reference signal is provided. A first stimulus signal is also provided, the first stimulus signal having a first polarization and having a first predetermine...
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JP2003069495A |
To discriminate coincidence/dissidence between a particular pulse train with a optical label pulse train of a high-speed optical packet signal temporally irregularly arrived from a transmission line by comparing them.The optical pulse tr...
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JP2003066500A |
To provide a wavelength package generator which is capable of generating wavelength packets of high wavelength stability by simple control and to provide a wavelength packet communication network using this wavelength packet generator.Th...
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JP2003066501A |
To obtain single pulse laser light of subfemto-second (10-16 sec) order with a simple device constitution.Nanosecond pulse laser light 2 of 1st wavelength is made incident on solid hydrogen 1 and nanosecond pulse laser light 3 of 2nd wav...
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JP2003060575A |
To improve degradation in transmission characteristics due to a strength noise of each wavelength signal generated due to a band limit of a wavelength branching filter of a receiving side. An optical communication system for transmitting...
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JP2003057702A |
To generate frequency sweep light having a wide band width with simple control in an optical frequency sweeper using an optical modulator utilizing electrooptic effects as an optical frequency shifter, to provide a wavelength packet gene...
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JP2003043532A |
To provide a means which enables wavelength conversion and regeneration of an input optical signal. A source (2) is provided which is on/off switchable of a continuous optical signal at a respective wavelength (λ2). A Michelson interfer...
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JP2003028723A |
To attain high spectrum resolution.A heterodyne beat signal is filtered by at least one matching filter in this optical spectrum analyzing method and this optical spectrum analyzing system of heterodyne base. In one embodiment, an input ...
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JP2003502902A |
A method and apparatus (10) are provided for transmitting (12, 14) and receiving (24, 26) multiple RF/microwave subcarriers on a single optical wavelength over an optical link. The method includes the steps of modulating a plurality of R...
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JP2003005240A |
To convert an optical packet signal constituted of a fast serial optical bit string to parallel optical bit strings to read a prescribe optical bit string.An optical bit string discrimination device is provided with an optical branching ...
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JP3365004B2 |
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JP3363991B2 |
PURPOSE: To obtain a frequency-standard laser apparatus whose frequency accuracy and stability are high and which is small and low-cost. CONSTITUTION: A comb generator 1 is constituted of a nonlinear crystal body 2. Total reflecting face...
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JP3360943B2 |
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JP2002544553A |
(57) [Summary] The present invention relates to an apparatus that detects or generates an optical signal by modulating an optical carrier. The above device includes the following items. That is, an element that produces at least one refe...
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JP2002365677A |
To provide a device which carries out the locking of the conjugate of a four-wave signal generated from a slave laser by introducing a laser beam generated by the master laser on the slave laser, and oscillates the light of the millimete...
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JP2002365682A |
To provide an all-optical wavelength converter/regenerator which can completely separate an input signal from an output signal. The delay interference all-optical wavelength converter converts a pulsed input signal Pin at a wavelength λ...
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JP2002365681A |
To provide optical wavelength transforming equipment which reduces necessary signal optical power and transforms a wavelength with simple constitution. The optical wavelength transforming equipment is provided with an electroabsorption m...
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JP3350988B2 |
Non-selective photoreceiver for frequency-modulated optical signals and optical link using this photoreceiver. …According to the invention, the photoreceiver laser is a FABRY-PEROT type laser (60) operating in longitudinal multimod...
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JP3349945B2 |
A signal conversion device comprises a light source for emitting continuous wave (CW) light at a predetermined wavelength lambd, an optical element having a saturable absorption function, and a wavelength demultiplexing circuit for separ...
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