| 摘要 |
PURPOSE:To generate nearly a short light pulse trains having no chirp b delaying one of two light pulse trains having different wavelengths which are generated in a 4-photon mixing process and then inputting both light pulse trains to a nonlinear material. CONSTITUTION:An input light pulse train 1 and the exciting light from a laser 3 for excitation are put together by an optical multiplexer 2 into one beam, which is incident on the 1st nonlinear material 4. The light pulse train which has wavelength lambda2=2lambdal-lambda1 and is in the same with the input light pulses is radiated from a output terminal together with an amplified input light pulse train. The laser light for the excitation is removed by a optical demultiplexer 5 and then beams of lambda1 and lambda2 are separated by an optical demultiplexer 6; and the intensity of the light pulse train of lambda1 is attenuated and the pulse train is delayed through a delay line 8. Those two pulse trains are multiplexed by an optical multiplexer 9 and incident on the 2nd nonlinear material 10 to generate nearly the light pulse train having wavelength 2lambda2-lambda1. The generating process is limited to only when the input pulse trains of lambda1 and lambda2 overlap each other spatially, and short light pulses are therefore generated. An output light pulse train 12 is demultiplexed by an optical demultiplexer 11. |
