论文信息 - Efficient Er:YAG lasers at 1645.55 nm, resonantly pumped with narrow bandwidth diode laser modules at 1532 nm, for methane detection

Efficient Er:YAG lasers at 1645.55 nm, resonantly pumped with narrow bandwidth diode laser modules at 1532 nm, for methane detection

Eye safe laser operation at 1645.55 nm (6077 cm-1) of resonantly pumped Er:YAG laser systems is demonstrated in cw and Q-switched operation. High brightness diode laser modules emitting at 1532 nm have been utilized as pump sources providing an absorption efficiency of up to 96%. This leads to an overall efficiency of the Er:YAG laser of 30%. For cw operation, 9 W output power is possible at pump power of 30 W while Q-switching results in generation of more than 7 mJ pulses with duration of 60 ns and repetition rate of 500 Hz. The Er:YAG laser systems have been applied for methane detection measurements demonstrating their feasibility for CH4-DIAL applications

[1] Gang Li,et al. The HITRAN 2008 molecular spectroscopic database , 2005 .

[2] Igor Kudryashov,et al. Resonantly diode-pumped Er:YAG laser: 1470-nm versus 1530-nm CW pumping case , 2009, Defense + Commercial Sensing.

[3] K. O. White,et al. Coincidence of Er : YAG laser emission with methane absorption at 1645.1 nm , 1972 .

[4] Stefan Heinemann,et al. Single emitter based diode lasers with high brightness high power and narrow linewidth , 2011, LASE.

[5] Gerhard Ehret,et al. Optical parametric oscillators and amplifiers for airborne and spaceborne active remote sensing of CO2 and CH4 , 2011, Remote Sensing.

[6] J B McManus,et al. Astigmatic mirror multipass absorption cells for long-path-length spectroscopy. , 1995, Applied optics.

[7] M. Wirth,et al. Sensitivity studies for a space-based methane lidar mission , 2011 .