Paper 12913-37
Paper 12913-37
Red, green, and blue edge-emitting devices for beam scanning light engine architectures: from single emitters to arrays
On demand | Presented live 29 January 2024 Abstract
Laser beam scanners are of strong interest, as they offer a compact and low-power consumption solution for head-worn AR-displays and, more in general, for efficient and focus-free projection displays. In this framework, EXALOS has been leading the research and development of active light sources, focusing on optimizing red, green, and blue edge-emitting devices, including superluminescent diodes (SLEDs) and laser diodes (LDs). This work provides an overview of the performance achieved by single-emitter SLEDs and low-threshold LDs based on GaN, as well as AlGaInP, III-V semiconductors. Furthermore, we report on the development of emitter arrays. In particular, narrow-pitch devices with an emitter-to-emitter spacing of 10 μm and also a novel device design featuring both anodes and cathodes on the top chip surface are reported. The individual cathodes are fully independent and electrically insulated, ensuring an emitter-to-emitter resistance close to 1MOhm. Compared to conventional arrays with common cathode, the new architecture allows for integration with industry-standard current-sink drivers for efficient multi-LD modulation.
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Presenter
Marco Rossetti
EXALOS AG (Switzerland)
Dr. Rossetti has more than 20 years of experience in the conception, production and analysis of III-V compound semiconductor optoelectronic devices and has coauthored more than 50 scientific articles in peer-reviewed journals, holds multiple patents and has contributed to the publication of a book.
At EXALOS he leads the development of devices with visible light emission, with a particular attention to lasers and superluminescent diodes and has been instrumental in the successful launch of several products, providing an important contribution to innovation in the field.