Pulsed light generation device and pulsed light generation method

Abstract

This pulsed light generation device comprises: an oscillation unit that oscillates pulsed light; a control unit that is disposed on the downstream side of the oscillation unit in an optical path of the pulsed light and controls a time width of the pulsed light; and a modulation unit that is disposed on the downstream side of the control unit in the optical path of the pulsed light, modulates the wavelength of the pulsed light by using soliton self-frequency shift, and forms one or a plurality of beams of pulsed light having different wavelengths. The control unit controls the time width of the pulsed light so that the number of the beams of pulsed light formed by the modulation unit becomes a prescribed number.

Claims

1. A pulse light generation device comprising: an oscillator that emits pulse light; a control unit disposed downstream of the oscillator in the optical path of the pulse light and controlling the time width of the pulse light; and a modulation unit disposed downstream of the control unit in the optical path of the pulse light and modulating the wavelength of the pulse light using soliton self-frequency shift to form one or a plurality of pulse lights with different wavelengths, wherein the control unit controls the time width of the pulse light so that the number of pulse lights formed by the modulation unit is a predetermined number.

2. The pulse light generation apparatus according to claim 1, wherein the control unit has a pair of diffraction gratings, and the distance between the pair of diffraction gratings is set to a distance such that the number of pulse light beams formed by the modulation unit is a predetermined number.

3. The pulsed light generating apparatus according to claim 2, wherein the pair of diffraction gratings are fixed at the distance between them as the set distance.

4. The pulsed light generating apparatus according to claim 2, wherein the pair of diffraction gratings are configured to be adjustable in distance between them.

5. The pulse light generation apparatus according to any one of claims 1 to 4, wherein the control unit controls the time width of the pulse light so that the value relating to the wavelength of the pulse light formed by the modulation unit becomes a predetermined value.

6. A pulse light generation apparatus according to any one of claims 1 to 5, comprising: a branching unit disposed downstream of the modulation unit in the optical path of the pulse light and branching a plurality of the pulse light; an amplification unit disposed in at least one of the optical paths of the plurality of pulse light branched by the branching unit and amplifying the pulse light; and a sum frequency generation unit that combines a part or all of the plurality of pulse light branched by the branching unit, at least one of which is amplified by the amplification unit, and emits sum frequency light by sum frequency generation.

7. A pulse light generation apparatus according to any one of claims 1 to 6, comprising an optical intensity control unit disposed between the oscillator and the modulation unit in the optical path of the pulse light, which controls the intensity of the pulse light for each pulse.

8. A pulse light generation method comprising: an oscillation step of oscillating pulse light; a control step of controlling the time width of the pulse light oscillated in the oscillation step; and a modulation step of modulating the wavelength of the pulse light after control by the control step using soliton self-frequency shift to form one or a plurality of pulse lights with different wavelengths, wherein the control step controls the time width of the pulse light so that the number of pulse lights formed in the modulation step is a predetermined number.

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