Showing papers by "Jianquan Yao published in 2003"
TL;DR: In this paper, a model based on the self-mixing interference effects at different optical feedback levels is presented in terms of the threshold condition of a compound cavity laser, which considers the optical feedback effect on the real and imaginary parts of the complex refractive index of the laser active medium and the asymmetric external cavity effect.
Abstract: Based on the study of the self-mixing interference effects at different optical feedback levels, a model is presented in terms of the threshold condition of a compound cavity laser. This model considers the optical feedback effect on the real and imaginary parts of the complex refractive index of the laser active medium and the asymmetric external cavity effect. Complex waveforms experimentally observed at high feedback levels can be interpreted well by this model. Theoretical and experimental results show a potential increase in the resolution of the displacement measurement at a high optical feedback level or misalignment condition.
12 citations
Journal Article•
TL;DR: In this paper, a continuous wave (CW) Nd:YAG infrared laser at 1319 nm is reported and the energy level of 1319-nm wave was analyzed.
Abstract: A continuous wave (CW) Nd:YAG infrared laser at 1319 nm is reported in this paper. The energy level of 1319-nm wave was analyzed. The repression of 1064-nm lasing and enhancement of 1319-nm output power were discussed. Mirror coating and cavity structure were studied and a maximum CW output power of 43 W at 1319 nm was achieved in experiments.
12 citations
Journal Article•
TL;DR: In this paper, an angle-tuned signal-resonated optical parametric oscillator (OPO) with periodically poled lithium niobate (PPLN) pumped by a diode-pumped Nd: YVO4 laser was demonstrated.
Abstract: We demonstrate an angle-tuned signal-resonated optical parametric oscillator (OPO) with periodically poled lithium niobate (PPLN) pumped by a diode-pumped Nd: YVO4 laser. 1499.8 - 1506.6 nm of signal wavelength is achieved at 140? by rotating a 29-?m period PPLN from 0°- 10.22°in the x-y plane while keeping the pump wave vertical to the resonator mirrors. Two pairs of the signal and idler waves of the same wavelengths can be achieved symmetrically for each pair of angles of rotation with same absolute value and opposite sign. Theoretical analyses on angle-tuned PPLN-OPO with pump wave vertical to the resonator mirrors are presented and in good agreement with our experimental results. It is also found that all interacting waves in the cavity (not inside the crystal) are always collinear for PPLN-OPO with the pump wave vertical to the resonator mirrors while phase-matching is noncollinear within the crystal.
12 citations
Journal Article•
TL;DR: In this article, an optical parametric oscillator (OPO) based on periodically-poled lithium niobate (PPLN) and pumped by a 1064.2-nm laser is demonstrated, which can be conveniently tuned by the means of changing its operating temperature.
Abstract: An optical parametric oscillator (OPO) based on periodically-poled lithium niobate (PPLN) and pumped by 1064.2-nm laser is demonstrated, which can be conveniently tuned by the means of changing its operating temperature. The parameters of the set-up and experimental results are introduced in this paper. We adjusted the operating temperature from 80 to 250 ?, the output wavelength shifted from 1485.4 to 1540.7 nm. The average of the shifts is 0.33 nm/?.
6 citations
Journal Article•
TL;DR: In this paper, a quasi-continuous-wave intracavity frequency-doubled Nd:YAG laser with a flat-flat laser cavity, 2 Kr-lamps, KTP crystal and an acousto-optically Q-switch was studied.
Abstract: A quasi-continuous-wave intracavity frequency-doubled Nd:YAG laser which operates at 660 nm is studied. By using a flat-flat laser cavity, 2 Kr-lamps, KTP crystal and an acousto-optically Q-switch, 2-W output power at 660 nm is obtained. The relationship between laser cavity length and output power is analyzed.
5 citations