Abstract: A stimulated Raman scattering microscope device is configured to irradiates a sample with a first optical pulse at a first repetition frequency, to irradiate the sample with a second optical pulse of an optical frequency different from an optical frequency of the first optical pulse at a second repetition frequency, and to detect optical pulses of the first repetition frequency that are included in detected light from the sample irradiated with the first optical pulse and the second optical pulse, as a detected optical pulse train. The second optical pulse is generated by dispersing predetermined optical pulses that include lights of a plurality of optical frequencies, regulating to output optical pulses of a predetermined number of different optical frequencies out of the dispersed optical pulses at the second repetition frequency, and coupling the regulated optical pulses.

Abstract: A flow cytometer including a flow cell in which an imaging object flows; a laser beam irradiator configured to radiate laser beam; a camera including an image sensor of N×M pixels; and an optical system configured to introduce the laser beam from the laser beam irradiator to imaging range of flow cell and to introduce signal light, such as transmitted, reflected or scattered light, from imaging range of flow cell, to camera. Optical system includes a mirror device that is placed on a Fourier plane of imaging optical system, that has at least one mirror specularly reflecting the signal light, and that is driven and rotated in conjunction with a flow in flow cell, such that each part of an image formed by the signal light is introduced into an identical pixel of the image sensor for at least a predetermined time period from a predetermined timing.

Abstract: A flow cytometer including a flow cell in which an imaging object flows; a laser beam irradiator configured to radiate laser beam; a camera including an image sensor of N×M pixels; and an optical system configured to introduce the laser beam from the laser beam irradiator to imaging range of flow cell and to introduce signal light, such as transmitted, reflected or scattered light, from imaging range of flow cell, to camera. Optical system includes a mirror device that is placed on a Fourier plane of imaging optical system, that has at least one mirror specularly reflecting the signal light, and that is driven and rotated in conjunction with a flow in flow cell, such that each part of an image formed by the signal light is introduced into an identical pixel of the image sensor for at least a predetermined time period from a predetermined timing.

Abstract: A stimulated Raman scattering microscope device is configured to irradiates a sample with a first optical pulse at a first repetition frequency, to irradiate the sample with a second optical pulse of an optical frequency different from an optical frequency of the first optical pulse at a second repetition frequency, and to detect optical pulses of the first repetition frequency that are included in detected light from the sample irradiated with the first optical pulse and the second optical pulse, as a detected optical pulse train. The second optical pulse is generated by dispersing predetermined optical pulses that include lights of a plurality of optical frequencies, regulating to output optical pulses of a predetermined number of different optical frequencies out of the dispersed optical pulses at the second repetition frequency, and coupling the regulated optical pulses.

Abstract: The measurement apparatus combines first and second lights from first and second light generators to focus the combined light to a sample, and detect the first or second light intensity-modulated by stimulated Raman scattering. The first light generator includes a light dispersion element separating the light from a light introducing optical system in different directions according to light frequencies, and drives at least one of the light dispersion element and part of the light introducing optical system so as to change an incident angle of the light to the light dispersion element to extract part of the separated light, thereby making a light frequency of the first light variable. The second light generator produces a plurality of the second lights having mutually different light frequencies. The apparatus measures a Raman spectrum by changing the light frequency of the first light.

Abstract: An optical microscope that can prevent an increase in the complexity of the light source system is equipped with optics readily capable of adequate operation even when the modulation frequency is increased to reduce the impact of the intensity noise of the laser. The optical microscope irradiates a sample with a first train of optical pulses having a first optical frequency, which is generated by a first light source, and a second train of optical pulses having a second optical frequency, which is temporally synchronized with the first train of optical pulses and is generated by a second light source, and detects light scattered from the sample. A first repetition frequency of the first train of optical pulses is an integral sub-multiple of a second repetition frequency of the second train of optical pulses.

Abstract: The stimulated Raman scattering detection apparatus includes first and second light pulse generators (1, 2) respectively generating first and second light pulses with first and second pulse periods, an optical system combining the first and second light pulses and focusing the combined light pulses onto a sample, and a detector (10) detecting the second light pulses intensity-modulated by stimulated Raman scattering generated by focusing of the combined light pulses onto the sample. The second light pulse generator divides each raw light pulse emitted with the second pulse period into two light pulses, delays one of the two light pulse with respect to the other thereof and combines the one light pulse divided from one raw light pulse and delayed, with the other light pulse divided from another raw light pulse emitted after the one raw light pulse, to generate the second light pulse.

Abstract: The present invention provides a method for narrowing a spectral width that can also be adapted to an ultrashort optical pulse emitted from a wavelength tunable light source, and that can provide an output optical pulse with a narrow spectral width and a low noise component, and an optical element and a light source device that use the method for narrowing a spectral width. The method includes using an optical waveguide member (2) to cause a soliton effect in an input optical pulse (1) within the optical waveguide member (2), thereby narrowing a spectral width of the input optical pulse (1) to provide an output optical pulse (3), the optical waveguide member (2) having dispersion characteristics such that the average of a second-order dispersion value (?2) with respect to the input optical pulse (1) is negative, and the absolute value of the second-order dispersion value (?2) increases in a propagation direction of the input optical pulse (1).

Abstract: The Raman scattering measuring apparatus includes a first light generator to produce a first light, a second light generator to produce a second light having a frequency different from that of the first light, an optical system to focus the first and second lights to a sample, and a detector to detect the first or second light intensity-modulated by Raman scattering. The first light generator includes a wavelength extractor that performs a wavelength filtering to extract light of an extraction wavelength from light in a wavelength range including the extraction wavelength and an amplification of the light extracted by the wavelength filtering. The wavelength extractor performs a first filtering on an entering light, a first amplification on the light extracted by the first filtering, a second filtering on the light amplified by the first amplification and a second amplification on the light extracted by the second filtering.

Abstract: A solid-state image pickup device capable of taking more light into light receiving regions is provided.

Abstract: An optical modulator includes: a substrate made of a material having an electro-optical effect; an optical waveguide formed on the substrate; and a modulation electrode for modulating an optical wave propagating through the optical waveguide, wherein emitted light emitted from the optical waveguide is guided by optical fiber, and polarization of the substrate is reversed in a predetermined pattern along the optical waveguide so as to provide waveform distortion having a characteristic opposite to a wavelength dispersion characteristic of the optical fiber.

Abstract: An optical microscope that can prevent an increase in the complexity of the light source system is equipped with optics readily capable of adequate operation even when the modulation frequency is increased to reduce the impact of the intensity noise of the laser. The optical microscope irradiates a sample with a first train of optical pulses having a first optical frequency, which is generated by a first light source, and a second train of optical pulses having a second optical frequency, which is temporally synchronized with the first train of optical pulses and is generated by a second light source, and detects light scattered from the sample. A first repetition frequency of the first train of optical pulses is an integral sub-multiple of a second repetition frequency of the second train of optical pulses.

Abstract: The stimulated Raman scattering detection apparatus includes first and second light pulse generators (1, 2) respectively generating first and second light pulses with first and second pulse periods, an optical system combining the first and second light pulses and focusing the combined light pulses onto a sample, and a detector (10) detecting the second light pulses intensity-modulated by stimulated Raman scattering generated by focusing of the combined light pulses onto the sample. The second light pulse generator divides each raw light pulse emitted with the second pulse period into two light pulses, delays one of the two light pulse with respect to the other thereof and combines the one light pulse divided from one raw light pulse and delayed, with the other light pulse divided from another raw light pulse emitted after the one raw light pulse, to generate the second light pulse.

Abstract: The invention provides an optical microscope that prevents an increase in the complexity of the light source system and is equipped with optics readily capable of adequate operation even when the modulation frequency is increased in order to reduce the impact of the intensity noise of the laser, etc. This optical microscope 100 irradiates a sample 6 with a first train of optical pulses having a first optical frequency, which is generated by a first light source, and a second train of optical pulses having a second optical frequency, which is temporally synchronized with the first train of optical pulses and is generated by a second light source, and detects light scattered from the sample 6. The repetition frequency of the train of optical pulses generated by the first light source is an integral sub-multiple of the repetition frequency of the train of optical pulses generated by the second light source.

Abstract: A synchronous optical signal generation device includes: an optical phase detector that compares the phase of a reference optical signal with a phase of an optical beat signal to generate a phase error signal; a shaping mechanism that shapes the phase error signal; and a voltage controlled optical signal generator that generates an optical beat signal based on the shaped phase error signal and that outputs the optical beat signal while feeding the optical beat signal back to the phase detector.

Abstract: The present invention provides a method for narrowing a spectral width that can also be adapted to an ultrashort optical pulse emitted from a wavelength tunable light source, and that can provide an output optical pulse with a narrow spectral width and a low noise component, and an optical element and a light source device that use the method for narrowing a spectral width. The method includes using an optical waveguide member (2) to cause a soliton effect in an input optical pulse (1) within the optical waveguide member (2), thereby narrowing a spectral width of the input optical pulse (1) to provide an output optical pulse (3), the optical waveguide member (2) having dispersion characteristics such that the average of a second-order dispersion value (?2) with respect to the input optical pulse (1) is negative, and the absolute value of the second-order dispersion value (?2) increases in a propagation direction of the input optical pulse (1).

Abstract: An optical modulator includes: a substrate made of a material having an electro-optical effect; an optical waveguide formed on the substrate; and a modulation electrode for modulating an optical wave propagating through the optical waveguide, wherein emitted light emitted from the optical waveguide is guided by optical fiber, and polarization of the substrate is reversed in a predetermined pattern along the optical waveguide so as to provide waveform distortion having a characteristic opposite to a wavelength dispersion characteristic of the optical fiber.

Abstract: The invention provides an optical microscope that prevents an increase in the complexity of the light source system and is equipped with optics readily capable of adequate operation even when the modulation frequency is increased in order to reduce the impact of the intensity noise of the laser, etc. This optical microscope 100 irradiates a sample 6 with a first train of optical pulses having a first optical frequency, which is generated by a first light source, and a second train of optical pulses having a second optical frequency, which is temporally synchronized with the first train of optical pulses and is generated by a second light source, and detects light scattered from the sample 6. The repetition frequency of the train of optical pulses generated by the first light source is an integral sub-multiple of the repetition frequency of the train of optical pulses generated by the second light source.

Abstract: A solid-state image pickup device capable of taking more light into light receiving regions is provided.

Abstract: A spectroscopy device that separates input light into a plurality of wavelength ranges. A metal body has a hole or aperture which is open on the upper side. The hole or aperture is formed in a polygonal shape having at least a pair of opposite faces not parallel to each other in horizontal cross-section. Inner side faces of the hole or aperture are finished as mirror like reflection surfaces. Polarized input light inputted from the opening to the hole or aperture is reflected by the reflection surfaces and a standing wave is generated inside of the hole or aperture by self interference, whereby the input light is separated into a plurality of wavelength ranges.