Investigation On Characteristics Of 1.6μm Er-doped Solid State Laser

Since the late 20 th century,the global climate deteriorating,making the world more and more pressing needs of atmospheric wind field data to the appropriate disasterprevention.Coherent laser Doppler wind radar has high accuracy,the measured winddistance etc,and it has gradually become a long-range atmospheric wind field of an effective tool.1.6μm solid-state lasers because of its atmospheric, transmissionwindow at eye-safe band band as advantages, has become of coherent Dopplerwind radar laser light of the new hot spot.Er: YAG solid state laser produces 1645nm and 1617nm laser output, the band in the atmospheric transport and the eye-safe band, and the 1617nm laser methane and other gases in the air to avoid the general laser absorption loss, so Er: YAG coherent Doppler Radar source has certain advantages. From the theoretical and experimental aspects of 1532nm laser pumped 1.6μm Er: YAG Q-switched continuous and single longitudinal mode laser is studied in detail.In this paper, we first established the Er: YAG ring laser quasi-continuous output two-level rate equation. Continuous operation and then deduced the laser output power and pump power relationship between the expression and discussion of the Er³⁺ doping concentration. Theory of optical parametric oscillation using doped MgO: PPLN OPO four-mirror linear cavity is analyzed theoretically and experimentally, resulting in the 1532nm laser as Er: YAG pump source, when the pump power of 8W, received the highest power of 797mW Wavelength 1645nm laser output. FP cavity increases with the way to get a single longitudinal mode laser output, and won the 1617nm wavelength tunable laser output. Using acousto-optic Q of Er: YAG experiment, obtained repetition 100Hz, pulse energy 1mJ, more than 100ns pulse width laser output. And through the Er: YAP low-temperature experiments under the conditions obtained in the 77K 1609nm and 1623nm laser output.