Development and implementation of a laser headlight system for electro‐optic characteristic measurement and comparison

Abstract

Summary In this study, a laser headlight driving controller (LHDC) using the controller area network (CAN)‐bus communication system was developed and implemented for vehicle headlight applications. To observe temperature variations that influence the forward‐bias voltage and optical power of laser diodes, the laser diode was placed in an ambient temperature‐testing chamber to measure the electro‐optic characteristics and calculate the electro‐optic conversion efficiencies. The optical power and conversion efficiency values obtained at different temperatures (from negative to positive temperatures) when optical power adjustment was executed using analog and pulse‐width modulation technologies were compared. Moreover, a human‐machine operating interface was developed using the LabVIEW software. Therefore, the LHDC and laser optical power can be controlled using a computer through the CAN‐bus communication system to control the LHDC and monitor it.

Simulation and implementation of a two‐mode‐operation transconductance regulator with a Gallium Nitride High‐Electron‐Mobility Transistor

“…Moreover, the input power source was from the V cc (Figure 3), and the input electrical power P e_in could be calculated by V cc  I ld (Figure 3). Therefore, the electro-optic conversion efficiency 38 could be calculated as η eo = P oop /P e_in  100%. In different duty cycle ratios of 20%, 40%, 60%, and 80%, η eo were 6.84%, 10.8%, 13.8%, 17.7%, and 20.6%, as shown in Figure 13.…”

Employing a Laser Headlight Electrical System to Measure and Calculate Electro-Optic Conversion Efficiencies of Blue-Beam Laser Diodes

“…The present article was hence conducted to fill these lacks. This paper is a research extension of [19]; however, new original contributions present in this paper. This paper organizes five sections.…”