Efficient intra-cavity frequency doubled, diode-pumped, Q-switched alexandrite laser directly emitting in the UV.

We present an intra-cavity frequency doubled Q-switched diode-pumped alexandrite ring-laser directly emitting in the UV at 386 nm. Using LBO as nonlinear crystal, the laser yields a pulse energy up to 3 mJ at 500 Hz with an excellent beam quality of M = 1.1.

Energy-scaling of a diode-pumped Alexandrite laser and prototype development for a compact general-purpose Doppler lidar.

We present design and performance data of an energy-scaled diode-pumped Alexandrite laser in single longitudinal mode operation developed as a beam source in a mobile general-purpose Doppler lidar. A maximum pulse energy in Q-switched operation of 4.6 mJ and a maximum average power of 2.

Rugged diode-pumped Alexandrite laser as an emitter in a compact mobile lidar system for atmospheric measurements.

We present design and performance data of two diode-pumped Alexandrite lasers developed explicitly as laser emitters in mobile potassium resonance lidar systems. The lasers yield an output power of up to 1.75 mJ at a repetition rate of 500 Hz with a beam quality of $M{{^2}} \lt {1.

Diode-pumped cw Alexandrite laser with temporally stable 6.5 W in TEM operation with prospect of power scaling.

We present the design of a longitudinally diode-pumped Alexandrite laser in continuous-wave operation and resulting performance data. A laser power of 6.5 W in fundamental mode operation was measured, which is, to the best of our knowledge, the highest laser power in fundamental mode operation yet reported.

Diode-pumped Q-switched Alexandrite laser in single longitudinal mode operation with Watt-level output power.

We present significantly improved performance data of a diode-pumped -switched Alexandrite laser in single longitudinal mode operation developed as a beam source for resonance lidar systems. The average output power of the laser-operating at the potassium resonance at 770 nm with a linewidth below 10 MHz-could be increased by a factor of five to the Watt-level by means of an optimized resonator design and pump scheme. The pulse energy is 1.

Diode-pumped alexandrite ring laser in single-longitudinal mode operation for atmospheric lidar measurements.

We present, to the best of our knowledge, design and performance data of the first diode-pumped Alexandrite ring laser in Q-switched single-longitudinal mode (SLM) operation. The laser resonator contains two Alexandrite crystals, which are pumped longitudinally by means of two laser diode-bar modules emitting at 636 nm. Single-longitudinal mode operation is achieved by seeding the laser with a diode laser operating in SLM and actively stabilizing the cavity, yielding a linewidth of < 10 MHz at the potassium resonance line at 770 nm.

Two stage Innoslab amplifier for energy scaling from 100 to >500 mJ for future lidar applications.

An Nd:YAG-MOPA system consisting of a stable oscillator and two subsequent Innoslab-based amplifier stages has been designed and built as a technology demonstrator for future lidar applications. Overall, the authors demonstrate that it generates more than 500 mJ of pulse energy at a 1064 nm wavelength and 100 Hz pulse repetition frequency at about 30 ns pulse duration in the single longitudinal mode. Seeded with 75 mJ pulses, the second amplifier stage achieved an optical efficiency (extracted energy to pump energy) of more than 23% while preserving excellent beam quality.