Pulse shaping fiber laser at 15 μm

Abstract

In this paper we present, for the first time to our knowledge, a new pulse shaping technology (modulation schemes for seed laser) used to mitigate pulse narrowing effect and SBS effect in a high energy Er:Yb codoped fiber master oscillator power amplifier system at 1.5 μm to obtain longer pulse duration and higher energy. An average power of over 1.3 W and a pulse energy of over 0.13 mJ were obtained at 10 kHz repetition rate with a pulse duration of 200 ns and near-diffraction-limited beam quality (M(2)<1.2).

Temporally Programmable Hybrid MOPA Laser with Arbitrary Pulse Shape and Frequency Doubling

“…In the fields of optical sensing and Lidar applications, a long pulse duration, a good pulse shape, as well as a narrow spectral linewidth are required to achieve high precision measurements [1][2][3][4][5]. Master oscillator power amplifier (MOPA) systems seeded by a modulated semiconductor diode is a cost-effective approach to obtaining the above parameters.…”

“…Many researchers have reported works on the pre-compensation of pulse distortion in master oscillator fiber power amplifier (MOFPA) systems [7][8][9][10][11]. Although it is easy to obtain G(t) and control the pulse shape in fiber amplifiers, the peak power is limited by the nonlinear effect in the fiber [5,12], especially for the case of narrow spectral linewidth.…”