We present state-of-the-art performance from laser based light sources based on semipolar GaN. Recent advances toward the commercialization of blue, InGaN semipolar laser diodes are described. Additionally, we introduce next generation white light sources based on laser-pumped phosphor architectures.
KEYWORDS: Quantum wells, Waveguides, Semiconducting wafers, Semiconductor lasers, Optical tweezers, Signal attenuation, High power lasers, Lab on a chip, Refractive index, Cladding
Record values for the rollover power and rollover linear power densities of 9xx nm devices, obtained by simultaneous
scaling of length and d/Γ, are reported. The values for d/Γ lay in the range 0.8 μm to 1.2 μm with corresponding cavity
lengths from 3.5 mm to 5 mm. The transversal structures were asymmetric, with a higher refractive index on the n side.
An optical trap was helpful in reducing the radiation extension on the p side and the overall thickness. The highest
rollover linear power densities were 244 mW/μm for structures without an optical trap and 290 mW/μm for those that
included an optical trap
Photonic integration of large arrays of high power, single mode lasers using quantum well intermixing technology in a small form-factor package is described. Lifetime analysis reveals excellent reliability of large element laser arrays packaged into small form-factor optical systems.
The state of the art of III-V semiconductor based MOEMS is presented with a special emphasis on InP and related materials. It is shown that the MOEMS technology can enhance considerably the capabilities of optical micro-cavities, which are considered as a major component for optical signal processing and light generation. Illustrations of the potential of III-V MOEMS are given in the fields of optical telecommunications. Design and fabrication of highly selective and widely tunable optical filters for wavelength division multiplexing systems are presented. These devices are monolithic and are based on surface micro-machining technology. They combine a variety of very attractive properties such as low control power, low insertion loss, tunability, small bandwidth no polarization dependence, simple fiber coupling, no memory effects and reasonable tuning speed. Fiber to fiber transmission characterizations of packaged filters are presented, including bit error rate measurements. Future prospects implying the use of multi-air-gap MOEMS structures as a basic building-block for a wide variety of routing photonic devices are proposed.
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