OPTICAL FREQUENCY COM STABILIZATION LIGHT SOURCE AND METHOD

• Main Authors: MIZUTORI AKIRA, ISHIZAWA ATSUSHI, KOGA MASABUMI, NISHIKAWA TADASHI
• Format: Patent
• Language: English
• Published: 24.07.2014
• 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

PROBLEM TO BE SOLVED: To obtain an optical frequency COM in which the offset optical frequency is stabilized by enhancing the detection sensitivity of a CEO beat signal.SOLUTION: An optical frequency COM stabilization light source is constituted of a laser pulse light source 1, a non-linear medium 2 for enlarging the optical spectrum band of a laser pulse, wavelength 2 branch means 3 for branching broad spectrum band light into a long wavelength component and a short wavelength component, a non-linear optical crystal 4 for generating the second harmonic of long wavelength component of the broad spectrum band light, time difference adjustment means 5 for adjusting the optical path length of short wavelength component of the broad spectrum band light, 2 branch means 6 for branching the second harmonic of a long wavelength component and the short wavelength component into two after multiplexing, a balance receiver 7 for receiving the light branched into two and detecting a beat signal, and a feedback circuit 8 for controlling the laser pulse light source 1 by comparing the frequency of the beat signal and a predetermined reference frequency.