High-energy hundred-picosecond fiber-solid hybrid laser and its application in laser-induced damage in PIN photodiode

Abstract

We report on a home-made high-energy hundred-picosecond fiber-solid hybrid laser system, which consists of a high-stability all-fiber seed source and a high-energy quasi-continuouswave laser diode side-pumped Nd:YAG regenerative amplifier. With this system, pulse energy of 4 mJ and pulse duration of 302 ps have been achieved at 500 Hz repetition rate. The highenergy picosecond pulses of this laser amplifier are used for the experiments of laser-induced damage in the PIN photodiode. Detection signals and damage morphologies in the damage process have been observed and studied. The failure threshold of 26 GW cm −2 has been obtained under 1.82 mJ laser irradiation. In addition, the density distribution of laser-induced plasma has been simulated based on hydrodynamics theory, which is consistent with the experimental results. Damage behavior indicates that surface damage of the PIN photodiode can be analyzed by deep melting transients and plasma motion. This scheme takes advantage of the combination of fiber and solid laser to achieve efficient and stable energy amplification of picosecond pulses, which provides a better laser irradiation source for studying thermal and plasma damage of laser-induced damage in the PIN photodiode.

Compact 15 mJ Fiber–Solid Hybrid Hundred-Picosecond Laser Source for Laser Ablation on Copper

“…To further corroborate the plasma generation under this hundred-picosecond laser irradiation, in accordance with the hydrodynamic theory, three first-order quasi-linear partial differential equations were solved separately using the finite element method [43,44]. Accordingly, we obtained the two-dimensional spatial distribution of the free electron concentration within the 100 ps time range, as demonstrated in Figure 12.…”

Research on dispersion compensation using avalanche photodiode and pin photodiode

“…This block diagram is divided into three parts-transmitter side, transmission channel and receiver side. The transmitter consists of three basic components-pseudorandom bit sequence generator that generates the bits in random manner, optical source for converting electrical pulses to optical pulses and MZ modulator for transmission of those pulses to longer distances [22,23]. The transmission channel consists of SMF along with a combination of UFBG and EDC for mitigating the effect of dispersion before it reaches the receiver.…”

Experimental study of millisecond pulse laser ablation biased silicon-based PIN photodiodes

“…Wang et al utilized a picosecond laser to irradiate a PIN detector and observed that the surface damage of the PIN photodiode can be analyzed through deep melting transients and plasma motion. 8 A study conducted by Meng et al investigated the transient signal broadening of silicon-based photodiodes when exposed to nanosecond laser radiation. It was observed that the silicon-based PIN detector exhibited nonlinear saturation following laser irradiation, accompanied by a significant increase in response time.…”