VCSEL array module outputs 310W for laser ignition

July 06, 2016 // By Julien Happich
Designed for use in laser ignition, laser processing machines, and sensing applications, Ricoh's high-power 808nm fibre coupled VCSEL (vertical-cavity surface-emitting laser) module delivers 200W of power, while the standalone VCSEL array outputs 310W.

With this latest development, Ricoh claims it has increased the luminescence efficiency of its VCSEL elements, achieving large-scale integration of the light-emitting channels to significantly boost the overall output power of the laser array.

By improving the heat dissipation of the overall module, it is now capable of delivering the high energy output needed by the light source of the laser crystal in a laser ignition plug head. This type of plug head has been attracting attention as a means of igniting gas engines for power generation used in cogeneration systems and other equipment (Quasi-continuous-wave (QCW) operation: 200W). 

The VCSEL module uses a VCSEL array with a large number of light-emitting channels on its surface, along with a micro lens array (MLA) that integrates lenses corresponding to each light-emitting channel on a single chip.  Due to its structure, the VCSEL is said to feature exceptional wavelength stability in variable temperatures, offering around ten times the thermal stability in wavelength compared with conventional edge-emitting type lasers.

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