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In integrated cavity output spectroscopy (ICOS), a long optical cavity is often required for suppressing mode structure, which, however, blocks its application for fabricating compact gas sensors requiring gas cells with the volume at milliliter level or less. In this paper, we demonstrate that low-cost free-running Fabry–Perot diode lasers have intrinsic capability for promoting suppression of cavity...
A hybrid optical fiber delayer based on stimulated Brillouin scattering (SBS) slow light is proposed for dual-channel systems. It features two rings as delay lines, where one is an active ring with a Brillouin amplifier and the other is a passive ring. It combines SBS slow light delay with linear transmission delay, which extends the delay range in a great amount. A maximum SBS slow light delay of...
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