Optical frequency comb generation method based on optical frequency shift circuit

• Main Authors: CAO XUNYUAN, YU TAO, KONG LINYANG, LI PEILI, GAO DI
• Format: Patent
• Language: Chinese; English
• Published: 08.09.2017
• 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

The invention relates to an optical frequency comb generation method based on an optical frequency shift circuit. The method comprises the following steps that 1, a tunable laser sends out a tunable light source with the frequency of f0, the tunable light source as a seed light source is injected into the optical circuit, the frequency of the seed light source is shifted by deltaf after the seed light source passes through a frequency shifter, and a new spectral line with the frequency of f0+deltaf; 2, an EDFA in the circuit is used for compensating the loss of optical signals, the power of the new frequency spectrum line is amplified to a seed light source level, and the amplified new spectrum line is coupled with the seed light source so as to form a new light source frequency spectrum, wherein the new spectrum is composed of two spectrum lines, the power of the two spectrum lines is approximately identical, and the frequency difference of the two spectrum lines is deltaf; 3, the new spectrum is injected in