3.5: <i>Late‐News Paper</i>: RGB Laser for Mobile Projection Devices

Steegmueller, Ulrich; Kuehnelt, Michael; Unold, H.J.; Schwarz, Thomas; Schulz, R.; Singer, F.

doi:10.1889/1.2785214

Cited by 5 publications

(5 citation statements)

References 5 publications

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“…Osram employed optical pumping to produce efficient and compact green lasers with powers up to 50 mW [33]. They also built red-green minimodules of these lasers, which demonstrates the scalability of the technology [34]. The electrical-to-optical power conversion efficiency was 10%-20% with power outputs of 50-100 mW for green and 150-300 mW for red.…”

Section: Optically Pumped Semiconductor Lasersmentioning

confidence: 99%

Laser-based displays: a review

2010

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After the invention of lasers, in the past 50 years progress made in laser-based display technology has been very promising, with commercial products awaiting release to the mass market. Compact laser systems, such as edge-emitting diodes, vertical-cavity surface-emitting lasers, and optically pumped semiconductor lasers, are suitable candidates for laser-based displays. Laser speckle is an important concern, as it degrades image quality. Typically, one or multiple speckle reduction techniques are employed in laser displays to reduce speckle contrast. Likewise, laser safety issues need to be carefully evaluated in designing laser displays under different usage scenarios. Laser beam shaping using refractive and diffractive components is an integral part of laser displays, and the requirements depend on the source specifications, modulation technique, and the scanning method being employed in the display. A variety of laser-based displays have been reported, and many products such as pico projectors and laser televisions are commercially available already.

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Section: Optically Pumped Semiconductor Lasersmentioning

confidence: 99%

Laser-based displays: a review

2010

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“…The concepts of optically pumped semiconductor disk lasers (OPS) have been reported in a number of papers and presentations in the last few years [1][2][3][4][5][6][7][8] . OPS lasers are considered to be efficient, stable and long-life laser light sources, which provide excellent beam quality in a compelling form factor.…”

Section: Laser Architecturementioning

confidence: 99%

Progress in ultra-compact green frequency doubled optically pumped surface emitting lasers

et al. 2009

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Compact, stable and efficient green lasers are of great interest for many applications like mobile video projection, sensing, distance measurement and instrumentation. Those applications require medium values of output power in the 50mW range, good wall-plug efficiency above 5 % and stable operation over a wide temperature range. In this paper we present latest results from experimental investigations on ultra-compact green intracavity frequency doubled optically pumped semiconductor InGaAs disk lasers. The green laser setup has been limited to a few micro optical and semiconductor components built on a silicon backplane and fits within an envelope of less than 0.4 cc. An optical frequency looking scheme in order to fix the fundamental wavelength over varying operating conditions like changing output power and ambient temperature has been applied. The cavity has been optimized for fast modulation response and high efficiency using quasi-phase matching non-linear material. Recent data from cw and high-frequency characterization is presented.

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“…In a former publication already a RGB laser module comprising the RGB lasers, beam collimation and beam combination optics has been introduced [3]. The here presented study of the RGB module additionally comprises a rigid flex PCB with OSRAM's laser driver ASIC placed on the upper side and also comprising other electrical components for impedance matching and components of the switching power supply.…”

Section: Module Conceptmentioning

confidence: 99%

“…RGB lasers and MEMS mirror devices grow more and more into a product ready stadium [1][2][3][4][5][6][7]. Consequently a companion projector based on the flying spot approach recently has been introduced [8].…”

Section: Introductionmentioning

confidence: 99%