E. Palange

High power subnanosecond pulse generation in Nd YAG lasers

Abstract We describe the application of the self-injection and cavity dumping techniques to a Nd YAG laser. Single or double, highly stabilized nanosecond pulses are obtained with large efficiency.

A study of the self-injected laser for subnanosecond pulse generation

We present a detailed analysis of the self-injected Nd:YAG laser which is capable of generating subnanosecond duration pulses with peak powers as high as 200 MW. The model predicts that pulses with durations much shorter than the electrical rise time of the electrooptical switch driver can be obtained. Application of this technique to a conventionally Q-switched Nd:YAG laser allowed us to obtain 550 ps pulses with 120 mJ in a very stable and reliable way.

Picosecond pulse generation by intracavity nonlinear compression in self-injected Nd-YAG laser

Abstract A new type of laser which generates pulses with amplification band-limited picosecond duration is presented. 15 ps, 0.9 GW, 3 pps, λ = 1.06 μm in a single pulse are obtained with good stability. Accurate timing of the pulses can be achieved and no external pulse selection is required.

Self‐injected neodymium‐yttrium aluminum garnet laser with an unstable cavity

The first ’’self‐injected’’ unstable resonator laser is reported. 1‐ns, high peak power, single‐mode pulses are generated with neodymium‐yttrium aluminum garnet (Nd‐YAG) laser made with the same relevant optical components of the commercial DCR1 Quanta Ray oscillator.

Non-linear optical properties and femtosecond dynamics of CdTe quantum dots

The authors have grown CdTe quantum dots in glass, studied the relaxation dynamics in the femtosecond time scale, and measured the non-linear refractive index in the infrared. Their observations, of very large non-linear refractive index in the transparency region and femtosecond recovery times of the resonant non-linearity, indicate that these materials are most promising for all-optical photonic switching applications.

Design of a self-injected unstable cavity Nd: YAG Laser

A detailed analysis of a self-injected Nd: YAG laser with an unstable cavity is presented. With respect to the normal Q-switched laser-mode operation the pulse peak power is increased by a factor of eight with a pulse length of about 1 ns. Moreover single transverse mode operation is achieved, with divergence near the diffraction limit. An evaluation of the most significant parameters useful for the design of an unstable resonator for self-injection applications is also presented.