SymbolName & Brief Description Laser Diode: The function of the Laser Diode Driver is to provide current to the laser diode. The wavy arrows indicate light exiting the package. A huge array of applications exist for laser diodes. These can include spectroscopy, remote sensing, medical diagnostic...
Diode pumped lasers are, nevertheless, likely to become cheaper in the future through increased volume of production. Since laser diodes are limited by their peak power, the total energy output necessarily decreases with a shorter pump pulse duration. The single-shot aerial power density of a two...
Schematic of the experimental setup for heterodyne detection of the delayed feedback laser emission frequency. Laser one (LI) is subjected to delayed optical feedback. A second laser (LII) serves as a reference source, with the heterodyne signal created by the fast photo diode (PD). ...
Before concluding the discussion of laser diode structures, it is worth mentioning two additional types of structures that have developed rapidly in recent years. These are quantum well devices and high-power laser diode arrays. A quantum well is a very thin layer of semiconductor material between...
BS: beam splitter, AOM: acousto-optic modulator, APD: Si avalanche photodiode, FP: Fabry-Perot interferometer. (b) Schematic of the laser linewidth measurement [92]. The delayed self-heterodyne method can avoid the zero-frequency noise of the self-homodyne method and improve testing stability...
To enable high-speed underwater wireless optical communication (UWOC) in tap-water and seawater environments over long distances, a 450-nm blue GaN laser diode (LD) directly modulated by pre-leveled 16-quadrature amplitude modulation (QAM) orthogonal fre
The schematic diagram of a PLD deposition set-up using an excimer laser is shown in Figure 1a. It includes: a stainless-steel vacuum chamber, an excimer (KrF) laser source, laser beam delivery lenses, a combined rotative-turbo pump system to evacuate the chamber down to high-vacuum condition...
The schematic diagram of the BDL welding used in this investigation is given in Figure 1. More details about the BDL system at JWRI have been provided by Sato et al. [13] and Asano et al. [14]. Figure 1. Blue diode laser (BDL) welding set up. 2.3. Metallography For the microstruc...
A portable laser diode scanning head, aimable at each symbol to be read, emits and receives non-readily-visible laser light, and is equipped with a trigger-actuated aiming light arrangement for visual
is typically referred to as the threshold current and is denoted by the symbol Ith. It is generally desirable that the threshold current be as low as possible, resulting in a more efficient device. Thus, a threshold current is one measure used to quantify the performance of a laser diode. ...