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A method for measuring the frequency stability of tunable laser is proposed by using confocal Fabry-Perot(F-P)interferometer.The F-P interferometer is used to get the output frequency of the laser as a reference,and the method eliminates the need of an independent optical source as a frequency reference.Using this technique,the frequency stability of the tunable external-cavity diode laser(ECDL)is measured to be 2.26×10~(-9)with an integration time of 20 ms. 相似文献
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