Compact and efficient green lasers for mobile projector applications

Abstract

Abstract— Efficient and very‐compact projectors embedded into mobile consumer‐electronic devices, such as handsets, media players, gaming consoles, and GPS units, will enable new consumer use and industry business models. A keystone component for such projectors is a green laser that is commensurately efficient and compact. A synthetic green‐laser architecture is described that can achieve efficiencies of 15%. The architecture consists of an infrared distributed Bragg reflector laser coupled into a second‐harmonic‐generation device for conversion to green.

Computer-Generated Phase-Only Holograms for Real-Time Image Display

“…Quantifying this benefit has proven difficult, however, since there is widespread disagreement in the published literature from, for example, Bhatia et al (2009;; Buckley et al (2008); Lee et al (2009);Weber (2005) as to an acceptable value to use for the APL. The variation in reported values appears to result from the point at which the APL measurement is defined.…”

Role of surface roughness and lubricant film thickness in nanolubrication of sliding components in adaptive optics

“…In order to produce a compact green laser, a frequency doubling technique is used with a distributed Bragg reflector (DBR) laser diode, where a 1060 nm wavelength light is passed through a second harmonic generating crystal to produce a 530 nm green laser [1,2]. To correct for any lens misalignment, the green laser module uses an adaptive optics component with a drive mechanism to align the optics and maintain a constant power output with time and temperature [2,3]. The drive mechanism is commonly referred to as the smooth impact drive mechanism (SIDM) (Fig.…”

Device level studies of adaptive optics sliding components in microprojectors

“…A compact green laser with high power is not commercially available. In order to produce a compact green laser, a frequency doubling technique is used with a distributed Bragg reflector (DBR) laser diode, where a 1,060 nm wavelength light is passed through a second harmonic generating crystal to produce a 530 nm green laser (Bhatia et al 2008(Bhatia et al , 2009a. To correct for any lens misalignment, the green laser module uses an adaptive optics component with a drive mechanism to align the optics and maintain a constant power output with time and temperature (Bhatia et al 2009a, b) (Fig.…”