High-power, high-efficiency 660-nm laser diodes for DVD-R/RW

Yagi, T.; Nishiguchi, H.; Yoshida, Y.; Miyashita, M.; Sasaki, M.; Sakamoto, Y.; Ono, K.; Mitsui, Y.

doi:10.1109/islc.2002.1041151

Cited by 3 publications

(5 citation statements)

References 7 publications

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“…The ridge shape was designed to achieve high kink power of the L-I curve. 1 In the case of a single lateral mode LD with window mirror structure, the kink can be another limitation of the maximum output power, because the lasing mode is not single mode above the kink. The concentration of impurities, the thickness of the cladding layers and the cavity length were optimized to increase the kink power.…”

Section: Design and Fabricationmentioning

confidence: 99%

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640-nm laser diode for small laser display

et al. 2009

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Short wavelength and highly efficient AlGaInP quantum-well laser diode is promising as a red light source for small laser display application. Two kinds of the laser diodes are presented in this paper. A narrow ridge laser diode was designed for single lateral mode. In addition, a broad area laser diode was optimized for the higher power operation. To suppress a carrier leakage from an active layer, AlInP cladding layers were adopted to both of the lasers. Evaluation tests of the fabricated lasers were performed under CW operation. The wavelength of the narrow ridge laser was 636.0 nm under the condition of 25°C and 100 mW. Single lateral mode oscillation and the high wall plug efficiency of 29% were obtained. The beam divergences were 16° and 8° in fast and slow axes, respectively. The broad area laser showed lasing wavelength of 636.9 nm at 25°C for 200 mW output. The wall plug efficiency was 30% under this condition. Both of the lasers showed both high luminance and high wall plug efficiency. These lasers are suitable for small laser display applications.

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Section: Design and Fabricationmentioning

confidence: 99%

“…A 660 nm laser diode is well developed and commercialized for a DVD disc pickup application. 1 However, the shorter wavelength of ~ 640 nm is necessary for display applications because the eye sensitivity at 640 nm is almost three times lager than that at 660 nm. The required output power of the 640 nm LD is at least more than 50 mW.…”

Section: Introductionmentioning

confidence: 99%

640-nm laser diode for small laser display

et al. 2009

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“…Considering many severe requirements as a light source for a laser TV such as size, efficiency, reliability, cost, etc., laser diode (LD) is the most suitable laser light source. Recently advanced high power edgeemitting LD's with AlGaInP and GaN material systems for DVD writing sources could be utilized for red and blue laser light sources for laser TV with slightly modified wavelengths of 640nm and 447nm [2,3]. On the other hand, high-power green laser light has not been generated by LD directly, and second harmonic generation (SHG) of ~1060nm laser light seems to be the only technique for high power green laser light generation at present.…”

Section: Introductionmentioning

confidence: 99%

63.5L: Late‐News Paper: Planar‐Waveguide Green Laser for Laser TV

Hirano

Yanagisawa

Yamamoto

et al. 2008

Symp Digest of Tech Papers

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We have newly developed an ultra‐compact, highly efficient and high‐power green laser for a light source of laser TV. A planar‐waveguide configuration improves performance of solid‐state green laser dramatically. The laser consists of essential minimum three devices (a pump LD, a planar‐waveguide Nd:YVO4 and a planar‐waveguide PPMgLN). Output green peak power of 11.4‐W with the corresponding electrical efficiency of 21% is demonstrated. In addition, temperature insensitive features are also proved. The size of developed laser module is as small as 5cc. We believe this laser is the most suitable green laser light source for laser TV at present.

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“…It was found that recording speed is proportional to the square of the output power from the AlGaInP LDs. 1) Therefore, to increase recording speed, the output power from the AlGaInP LDs needs to be enhanced. Several methods have been proposed to improve output power, including the reduction in optical field confinement in the epitaxial growth direction by reducing quantum well (QW) thickness 2,3) or utilizing a large optical cavity design, 4,5) and the prevention of facet absorption by employing windowmirror structures.…”

Section: Introductionmentioning

confidence: 99%

“…6,7) More recently, several efforts have been made to reduce threshold current or operation current to further improve output power. 1,[8][9][10] On the other hand, the requirement for the maximum operation temperature of the AlGaInP LDs has also recently been increased from 60 to 80 C, 10) particularly for outdoor applications such as portable players or computers. Some efforts have also been made to improve the characteristic temperature by further reducing operation current 11,12) or by optimizing the active layer structure to minimize leakage current.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Barrier Structure for Strain-Compensated Multiple-Quantum-Well AlGaInP Laser Diodes

Huang¹,

Sun

2006

Jpn. J. Appl. Phys.

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A theoretical analysis of a strain-compensated multiple-quantum-well (MQW) AlGaInP laser diode (LD) has been conducted to minimize the operation current and enhance the operation temperature. The effect of the barrier height on the tensile-strain quantum barriers was studied under the same optical confinement and emission wavelength. The simulation results suggest that a more uniform and higher carrier distribution inside the MQW region can be obtained for a lower barrier height owing to the improvement in carrier injection. The performance of the AlGaInP LD is thus improved. However, when the barrier height is too small, higher spontaneous rates in the quantum barrier region deteriorate the LD performance instead. Theoretical analysis shows that an Al composition of 0.1 for the 0.5%-tensile-strain Al x Ga y In1-x-y P barrier is the optimal value for strain-compensated MQW AlGaInP LDs.

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High-power, high-efficiency 660-nm laser diodes for DVD-R/RW

Cited by 3 publications

References 7 publications

640-nm laser diode for small laser display

640-nm laser diode for small laser display

63.5L: Late‐News Paper: Planar‐Waveguide Green Laser for Laser TV

Optimization of Barrier Structure for Strain-Compensated Multiple-Quantum-Well AlGaInP Laser Diodes

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