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Vixar launches high efficiency Multi-Junction VCSEL


Multi-junction VCSEL boasts a world-record 60 percent power conversion efficiency at 940 nm

Vixar, a subsidiary of Osram, is launching its multi-junction VCSEL technology at Photonics West at the Moscone Center in San Francisco, February 4-6, 2020. The new multi-junction VCSEL boasts a world-record 60 percent power conversion efficiency at 940 nm, significantly higher than the single-junction performance of 53 percent.

The new multi-junction technology is said to represents the next leap forward for the VCSEL industry. The technology can be applied to products in the company’s portfolio and boasts slope efficiencies of 2 W/A in dual junction and 3 W/A in triple junction. It offers a world-record 60 percent power conversion efficiency —significantly higher than the comparable single-junction’s performance of 53 percent peak wall plug efficiency.

Greater efficiency reduces the overall thermal load. Higher power density leads to a reduced chip and package size, enabling simpler optic designs and system architecture.

The higher slope efficiency means that a much lower pulsing forward current is required to reach the same optical power as a single-junction VCSEL. The advantage for customers is greatly reducing the current required, which improves the switching speed of the driver. This reduction of current allows the VCSEL to deliver a remarkable one nanosecond pulse for tens or even hundreds of watts.

“Our record-setting multi-junction technology now puts us in a leading position in the VCSEL market” said Klein Johnson, co-founder and CTO of Vixar, a subsidiary of Osram. “Our VCSEL technology solves a critical need for customers and is poised to play a key role in shaping the next generation of consumer, industrial and automotive applications.”

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