Nearly stoichiometric LiTaO3 for bulk quasi-phase-matched devices

Furukawa, Yasunori; Nakamura, Masaru; Takekawa, Shunji; Kitamura, Kenji; Hatanaka, Takaaki; Nakamura, Koichiro; Ito, Hiromasa; Alexandrovski, A.; Fejer, M. M.

doi:10.1364/assl.2001.pd5

Cited by 9 publications

(10 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…8) As a nonlinear optical crystal for high power applications, MgOdoped stoichiometric LiTaO 3 (MgO:SLT) with a photorefractive damage threshold of 2 MW cm −2 and quite low GRIIRA have been reported. 9,10) Although the nonlinear optical coefficient is 13.8 pm V −1 in MgO:SLT, 7) bulk MgO: SLT devices can generate 10 W class green SH wave, [11][12][13] which is higher than that from the MgO:CLN devices. In addition, due to the absorption edge of 270 nm, 14) UV light generation at a wavelength of 355 nm was demonstrated by using bulk MgO:SLT QPM-SHG and SFG devices.…”

Section: Introductionmentioning

confidence: 94%

Enlargement of mode size in annealed proton-exchanged periodically-poled MgO doped stoichiometric LiTaO₃ waveguide for high power second harmonic generation

NORO

Okazaki

Mizobata

et al. 2022

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

Watt-class wavelength conversion is expected by enlarging the mode size of the channel waveguides to dozens of micrometers to avoid optical damage with high-power pump lasers. In this work, uniform periodically-poled (PP) structures in MgO doped stoichiometric LiTaO3 were fabricated by applying voltage with an SiO2 insulation layer. Annealed proton-exchanged waveguides with a full width at 1/e 2 maximum in a width of 43 μm and that in depth of 28 μm were obtained by proton exchanging for 4 h and thermal diffusion for 75 h. This waveguide can be excited by pump waves with a power of 8.6 W considering the optical damage threshold. Second harmonic generation with a wavelength of 515 nm was conducted in the low power region of about 35 mW to investigate the basic characteristics. Normalized wavelength conversion efficiency in the 15-mm-long PP structures was estimated to be 4.3%/W.

show abstract

Section: Introductionmentioning

confidence: 94%

Enlargement of mode size in annealed proton-exchanged periodically-poled MgO doped stoichiometric LiTaO₃ waveguide for high power second harmonic generation

NORO

Okazaki

Mizobata

et al. 2022

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…Electrooptic Bragg deflection devices reported thus far [3] suffered from the optical damage problem. MgO doped stoichiometric lithium tantalate (MgO:SLT) has a high optical damage threshold [5] higher than 20 V [2]. We propose a new device structure for reducing the driving voltage.…”

Section: Introductionmentioning

confidence: 99%

Electrooptic Bragg Deflection Modulator for UV Laser Light Using Periodically Poled MgO:s-LiTaO$_{3}$

Okazaki¹,

Chichibu²,

Yoshimoto³

et al. 2011

IEEE Photon. Technol. Lett.

View full text Add to dashboard Cite

We propose and demonstrate an electrooptic Bragg deflection optical modulator using a periodically poled MgO:s-LiTaO thin crystal for ultraviolet (UV) laser light. This modulator is a building block for implementation of a one-dimensional spatial light modulator, and can be driven by voltage lower than the conventional bulk-type device. The device was constructed by bonding a thin periodically poled MgO:SLT and a robust support plate with gold layers in-between. A thin crystal structure with good surface flatness was obtained. Good performances, which include a diffraction efficiency as high as 97.8% and a high extinction ratio, were accomplished at 355-nm wavelength.Index Terms-Bragg deflection, domain inversion, lithium tantalate, spatial light modulator, ultraviolet (UV) laser.

show abstract

“…However, the technique for fabrication of such waveguides of large mode size in damage resistant crystals has not been established. Especially for damage resistant MgO-doped stoichiometric lithium tantalate, 14,15) the report of waveguide fabrication is limited, although shallow APE waveguides were fabricated. [16][17][18][19] In this letter, we report development of deep-proton-exchanged (DPE) waveguides of large mode size in damage resistant MgO:s-LiTaO 3 crystal.…”

mentioning

confidence: 99%

Fabrication and evaluation of deep-proton-exchanged and annealed waveguides in MgO:stoichiometric-LiTaO₃

Okazaki

Chichibu

Yoshimoto

et al. 2015

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

We developed deep-proton exchanged (DPE) and annealed waveguides in MgO:stoichiometric-LiTaO3 crystal. We performed DPE in pyrophosphoric acid at 230 °C for 20 min and measured mode size and depth dependent on the annealing duration. High-quality planar waveguides of a mode size as large as 20 µm, suitable for electro-optic spatial light modulators for 355 nm UV wavelength, were obtained by annealing for 200 h.

show abstract

Nearly stoichiometric LiTaO3 for bulk quasi-phase-matched devices

Cited by 9 publications

References 4 publications

Enlargement of mode size in annealed proton-exchanged periodically-poled MgO doped stoichiometric LiTaO₃ waveguide for high power second harmonic generation

Enlargement of mode size in annealed proton-exchanged periodically-poled MgO doped stoichiometric LiTaO₃ waveguide for high power second harmonic generation

Electrooptic Bragg Deflection Modulator for UV Laser Light Using Periodically Poled MgO:s-LiTaO$_{3}$

Fabrication and evaluation of deep-proton-exchanged and annealed waveguides in MgO:stoichiometric-LiTaO₃

Contact Info

Product

Resources

About

Nearly stoichiometric LiTaO3 for bulk quasi-phase-matched devices

Cited by 9 publications

References 4 publications

Enlargement of mode size in annealed proton-exchanged periodically-poled MgO doped stoichiometric LiTaO3 waveguide for high power second harmonic generation

Enlargement of mode size in annealed proton-exchanged periodically-poled MgO doped stoichiometric LiTaO3 waveguide for high power second harmonic generation

Electrooptic Bragg Deflection Modulator for UV Laser Light Using Periodically Poled MgO:s-LiTaO$_{3}$

Fabrication and evaluation of deep-proton-exchanged and annealed waveguides in MgO:stoichiometric-LiTaO3

Contact Info

Product

Resources

About

Enlargement of mode size in annealed proton-exchanged periodically-poled MgO doped stoichiometric LiTaO₃ waveguide for high power second harmonic generation

Enlargement of mode size in annealed proton-exchanged periodically-poled MgO doped stoichiometric LiTaO₃ waveguide for high power second harmonic generation

Fabrication and evaluation of deep-proton-exchanged and annealed waveguides in MgO:stoichiometric-LiTaO₃