Lasers ♦ news digest


The final family is called the InnoLas OPO series, which is suited to science and research applications.


Itoffers nanosecond OPOs (optical parametric oscillators) as complete systems. The pump laser, the modules for frequency multiplication as well as the OPO resonator are integrated into a compact case.


Princeton Optronics is marketing 800 and near 800nm VCSEL arrays with output powers ranging from 100mW to over 10W peak power.


These devices are designed for use in consumer electronic applications such as gesture recognition, natural user interface and 3D content creation where near infrared illumination is needed.


In 3D image sensing, the VCSEL arrays provide very low speckle, sub-nanosecond rise and fall times, and high electrical-to-optical conversion with over 45% efficiency.


InnoLas SpitlLght600 OPO unit


All modules are centrally fed by a supply unit and operated using a µ-controller. Available are standard systems for the visible range (410nm – 700nm) and the infrared range (670nm – 950nm) with an energy output of 5mJ – 100mJ and a repetition rate of 10Hz.


An ultrafast phase adjustment module enables the unrestricted choice of output wavelengths for each single laser pulse within the entire tuning range. The systems are composed of modules and can be adjusted flexibly to the customers’ needs. This includes options such as midband/broadband outlets, fiberglass inlets, outlets for signal/idler/ pump radiation and many more. Just like all InnoLas lasers, the new OPO series guarantees for uncomplicated operation through its robust setup, user-friendly software and fast, reliable customer service.


Princeton Opto sets the world alight with its 800nm IR VCSELs


The gallium arsenide based illuminator chips are suited for consumer electronic 3D sensor applications


July 2012 www.compoundsemiconductor.net 119


Schematic of packaged VCSEL chip


These devices are highly suited to time-of-flight (TOF) or structured light applications and Princeton Opto believes they are preferred to LEDs and edge emitting lasers. This is because of their high efficiency, narrow and circular emission angle, short rise and fall times and flattop intensity profile.


They also work at temperatures as high as 800C.


The VCSELs are currently being made in large quantities and are claimed to ensure both high reliability and competitive costs compared to LEDs and conventional edge emitting lasers.


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