Laser Doppler velocimetry using photo-acoustic effect of CO 2 laser

Choi, Jong Woon; Yu, Moon-Jong; Kopica, Miroslaw

doi:10.1117/12.510205

Cited by 1 publication

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“…In previous research, many researchers analyzed the theory and observed the experiment phenomena of optical feedback effect focused on the laser diode. Along with further development of optical feedback effect theory and the research of a passel of new type medium, more and more researchers consider using new type lasers -the vertical-cavity surface-emitting laser (VCSEL) [15], the Yb: Er glass laser [16], the CO 2 laser [17], the distributed feedback (DFB) laser [18], etc. -for sensing applications which are based on optical feedback effect, looking forward to obtaining better performance.…”

Section: Introductionmentioning

confidence: 99%

Internal and External Optical Feedback Effect in Fiber Linear Lasers

Zhou¹,

Xia²,

Ge³

et al. 2013

JNW

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In this paper, models of internal and external optical feedback effect in fiber linear lasers have been presented. The effects of optical feedback could be equivalent to the variation of laser cavity loss, and the output expressions of two models are deduced. According to the simulation results, the optical feedback system in fiber linear lasers has the same phase sensitivity as the traditional self-mixing effect in semiconductor lasers. The experimental results show a good agreement with the simulated results. Comparing the output of internal structure with that of external structure, we can conclude that the internal optical feedback system can get higher output gain and stripe depth, which reveals that the internal feedback structure has better sensing characteristic

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