NEAR INFRARED PULSED LIGHT SOURCE AND TERAHERTZ WAVE GENERATION DEVICE

• Main Authors: HIROSAWA, Kenichi, HASEGAWA, Kiyotomo, NISHIDA, Mio, NOTAKE, Takashi, MINAMIDE, Hiroaki
• Format: Patent
• Language: English; French; German
• Published: 19.06.2024
• Subjects: BASIC ELECTRIC ELEMENTS; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; DEVICES USING STIMULATED EMISSION; ELECTRICITY; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

Disclosed is a near-infrared pulsed light source 10A including: a first near-infrared light source 11 to emit near-infrared laser light which is a continuous wave of wavelength longer than 1,240nm; and a pulse modulator to modulate the near-infrared laser light from the first near-infrared light source 11 with pulses, and to emit, as first near-infrared light, near-infrared pulsed light whose pulse width is less than or equal to one nanosecond, and whose extinction ratio is greater than or equal to a value which is a result of adding 10dB to a pulse duty ratio (dB) which is a ratio of a pulse width of each of the pulses and a period of the pulses.