SHORT-PULSE LIGHT GENERATING DEVICE AND METHOD

• Main Authors: MIZUTORI AKIRA, ISHIZAWA ATSUSHI, KOGA MASABUMI, TAKARA HIDEHIKO, NISHIKAWA TADASHI
• Format: Patent
• Language: English
• Published: 04.02.2013
• Subjects: 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; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

PROBLEM TO BE SOLVED: To enable generation of short-pulse light that has a pulse width of 200 femtosecond or less and has a high repetition frequency.SOLUTION: A short-pulse light generating device comprises: a CW light source 1 having an arbitrary center optical frequency; phase modulation means 2 for modulating a phase of continuous laser light from the CW light source 1; an optical gate 5 for increasing peak power by thinning down an optical pulse from the phase modulation means 2; an optical amplifier 6 for amplifying the optical pulse passing through the optical gate 5, and generating broadband light after enlarging an optical spectral range by a non-linear effect in the optical amplifier 6; and dispersion assignment means 7 for compressing the optical pulse amplified by the optical amplifier 6.