Planar-waveguide quasi-phase-matched second-harmonic-generation device inY-cut MgO-doped LiNbO3

Sakai, Kiyohide; Koyata, Yasuharu; Hirano, Y.

doi:10.1364/ol.31.003134

Cited by 27 publications

(11 citation statements)

References 15 publications

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“…However, traditional buried channel waveguide formed by ion-doping in congruent LiNbO 3 suffers from photorefractive damage and weak light confinement [3,4], which have limited their highpower performances. In the past few years, precisely machined 5 mol% MgO doped PPLN (MgO:PPLN) waveguide has been extensively studied and exploited [5][6][7][8][9][10][11]. The fabrication techniques involve adhesive-assisted or plasma-activated wafer bonding, sub-micrometer precisely controlled wafer lapping and polishing, and precise diamond blade dicing.…”

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confidence: 99%

“…222 mW SHG power with 58% conversion efficiency [10], and 304 mW output power with 72.9% conversion efficiency [11] have been reached using MgO:PPLN ridge waveguides. However, the maximum achievable power and efficiency of the waveguide is still limited largely by the green-induced infrared absorption (GRIIRA) [8][9][10]. Questions such as to what extent the GRIIRA affects the performance of the waveguides remains unanswered.…”

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confidence: 99%

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466 mW green light generation using annealed proton-exchanged periodically poled MgO: LiNbO_3 ridge waveguides

Sun

2012

Opt. Lett.

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We report high-power efficient green light generation by frequency doubling from a periodically poled MgO doped LiNbO(3) ridge waveguide. The ridge waveguide is fabricated by the annealed proton-exchanging and precise diamond blade dicing techniques. The ridge structure exhibits a surface roughness of only 3.7 nm, and near-90° vertical sidewall. The total insertion loss of an 8.5 µm wide and 1.4 cm long uncoated waveguide is 3.0 dB under direct fiber coupling. 466 mW of continuous-wave green light with an optical-to-optical conversion efficiency of 69.7% is obtained. To the best of our knowledge, this is the highest green light output power reached to date using a ridge-type LiNbO(3) waveguide device. Phase-matching temperature shift, tuning curve distortion, and waveguide loss increase are observed under high power operation. Our analysis shows that the photorefractive effect and the green induced infrared absorption are responsible for the observed phenomena, which becomes prominent under several megawatt per square centimeter power density.

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confidence: 99%

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confidence: 99%

466 mW green light generation using annealed proton-exchanged periodically poled MgO: LiNbO_3 ridge waveguides

Sun

2012

Opt. Lett.

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“…It consists of a 1.5mm-long pump laser diode, a 1.5mm-long planar-waveguide Nd:YVO 4 , and a 4mm-long planar-waveguide periodicpoled z-cut MgO:LiNbO 3 (PPMgLN). The detailed structures of planar-waveguide devices are almost similar to those shown in the references [4,5]. This green laser has common intra-cavity SHG scheme except that the laser cavity is based on planar-waveguide.…”

Section: Planar-waveguide Green Lasermentioning

confidence: 67%

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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“…Recently, a planar waveguide was used to increase the power handling abilities. 1.08 W of green light was obtained using a fiber laser as pump source [9] and 346 mW of green light was obtained using a master-oscillator power-amplifier (MOPA) [10]. The limited coupling efficiency of 20 % of the astigmatic and elliptical beam from the MOPA limited the output power.…”

Section: Introductionmentioning

confidence: 99%

High-power green light generation by second harmonic generation of single-frequency tapered diode lasers

Jensen

Andersen

Sumpf

et al. 2010

Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications IX

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We demonstrate the generation of high power (>1.5W) and single-frequency green light by single-pass second harmonic generation of a high power tapered diode laser. The tapered diode laser consists of a DBR grating for wavelength selectivity, a ridge section and a tapered section. The DBR tapered laser emits in excess of 9 W single-frequency output power with a good beam quality. The output from the tapered diode laser is frequency doubled using periodically poled MgO:LiNbO3. We investigate the modulation potential of the green light and improve the modulation depth from 1:4 to 1:50.

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Planar-waveguide quasi-phase-matched second-harmonic-generation device inY-cut MgO-doped LiNbO3

Cited by 27 publications

References 15 publications

466 mW green light generation using annealed proton-exchanged periodically poled MgO: LiNbO_3 ridge waveguides

466 mW green light generation using annealed proton-exchanged periodically poled MgO: LiNbO_3 ridge waveguides

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

High-power green light generation by second harmonic generation of single-frequency tapered diode lasers

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