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Journal of the European Optical Society-Rapid Publications
Fig. 1 | Journal of the European Optical Society-Rapid Publications

Fig. 1

From: Study of a periodic spectral fluctuation existing in a fibered optical feedback cavity-enhanced absorption spectroscopy (OF-CEAS)

Fig. 1

Schematic diagram of the OF-CEAS experimental setup employing a V-shaped cavity and a fibered DFB laser diode. The direct reflection at M0 will not return to the DFB, while part transmission light of the intra-cavity resonant field offers frequency selective optical feedback. The PZT2 mounted on the fiber collimator is used to modulate the phase of the feedback light, and the PZT1 mounted on M2 can adjust the cavity length to obtain cavity resonance

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