Stable current supply with protection circuits for a lead-salt laser diode

Abstract

A high-stability, high-level (1.3-A) current source circuit of modest cost is described, suitable for powering lead-salt laser diodes or other semiconductor devices, especially expensive, delicate, or rare experimental samples requiring the protection features this current supply offers. The supply features circuits to shut off current to the laser or other device smoothly and quickly (in less than 90 μs) if there is an overvoltage, overcurrent, main battery supply failure, or elevated temperature condition, to protect the laser or device from any of these potentially damaging conditions. Spectral data of a lead-salt laser emitting in the 1840-cm−1 region are presented to demonstrate the use of the current supply.

Design and Implementation of Power Supply of High-Power Diode Laser of LiDAR Onboard UAV

“…The laser diode has the following characteristics (see On the basis of the given laser diode, the topology of the laser diode for driving power supply is composed of two coupled coils (could be replaced by a pulsed transformer), a thyristor, TTL pulse signal, resister and capacitor [3][4][5][6]. The detail is shown in Fig.…”

“…The energy laser diode on the UAV platform is usually converted by power supply to a special pulsed energy, and then a pulsed laser is emitted from laser diode [1][2][3][4]. This traditional power supply had problems in efficiency and bulk, has been demonstrated that it is not proper for application on a small low-cost civilian UAV platform.…”