Generation of dual-wavelength pulses by frequency doubling with quasi-phase-matching gratings

We proposed a method to simultaneously implement birefringence-phase-matching (BPM) and quasi-phase-matching (QPM) second harmonic generation (SHG) and polarization coupling including six mismatches of wave vectors, in general case, in an optical superlattice (OSL). And the numerical simulations of SHG and polarization coupling in the OSL are carried out. The results indicate that unlike those of SHG processes with only one second harmonic (SH) reported, when one e-polarized fundamental pump is injected into the OSL, another o-polarized fundamental wave, an o-polarized and an e-polarized SHs can be simultaneously generated. The magnitudes of the o-polarized fundamental wave and SHs can be manipulated by an external dc electric field, which is useful when frequency conversion and signal tuning are required simultaneously.

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Efficient frequency doubling of a femtosecond pulse with simultaneous group-velocity matching and quasi phase matching in periodically poled, MgO-doped lithium niobate

Applied Physics Letters ◽

10.1063/1.1576296 ◽

2003 ◽

Vol 82 (20) ◽

pp. 3388-3390 ◽

Cited By ~ 26

Author(s):

Nan Ei Yu ◽

Sunao Kurimura ◽

Kenji Kitamura ◽

Jung Hoon Ro ◽

Myoungsik Cha ◽

...

Keyword(s):

Lithium Niobate ◽

Group Velocity ◽

Femtosecond Pulse ◽

Frequency Doubling ◽

Phase Matching ◽

Periodically Poled ◽

Simultaneous Group ◽

Quasi Phase Matching ◽

Velocity Matching

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A quasi‐phase‐matching technique for efficient optical mixing and frequency doubling

Journal of Applied Physics ◽

10.1063/1.322930 ◽

1976 ◽

Vol 47 (5) ◽

pp. 2025-2032 ◽

Cited By ~ 52

Author(s):

A. Szilagyi ◽

A. Hordvik ◽

H. Schlossberg

Keyword(s):

Frequency Doubling ◽

Phase Matching ◽

Quasi Phase Matching ◽

Matching Technique ◽

Optical Mixing

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Generation of sub-6-fs blue pulses by frequency doubling with quasi-phase-matching gratings

Optics Letters ◽

10.1364/ol.26.000614 ◽

2001 ◽

Vol 26 (9) ◽

pp. 614 ◽

Cited By ~ 31

Author(s):

L. Gallmann ◽

G. Steinmeyer ◽

U. Keller ◽

G. Imeshev ◽

M. M. Fejer ◽

...

Keyword(s):

Frequency Doubling ◽

Phase Matching ◽

Quasi Phase Matching

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Green Light Generated by Frequency-Doubling in LiNbO3 and LiTaO3 Thin Films

MRS Proceedings ◽

10.1557/proc-401-243 ◽

1995 ◽

Vol 401 ◽

Cited By ~ 3

Author(s):

J. J. Kingston ◽

F. Armani-Leplingard ◽

D. K. Fork ◽

G. B. Anderson

Keyword(s):

Thin Films ◽

Green Light ◽

Frequency Doubling ◽

Planar Waveguides ◽

Phase Matching ◽

Optical Losses ◽

Rocking Curve ◽

Modal Dispersion ◽

Quasi Phase Matching ◽

Scattering Losses

AbstractThin films of LiNbO3 and LiTaO3 are grown by off-axis magnetron sputtering on A12O3 and LiTaO3 substrates. When stoichiometry is precisely controlled, the films display excellent crystallographic and morphologic properties and have optical losses that are acceptable for frequency-doubling. LiNbO3/A12O3 samples have rocking curve widths as low as Δω = 76 arc sec and rms surface roughnesses less than 1 nm. Rocking curves performed with a resolution of 12 arc sec in 2θ indicate that there is very little tilt to the grains. Most of the width of the standard rocking curve is associated with variations in the interplanar spacing. The LiTaO3 films have similar characteristics. LiNbO3/LiTaO3 samples have rocking curve widths as low as Δω = 28 arc sec. Again, there is very little tilt misalignment to the grains, and the best samples have rms surface roughnesses less than 1 nm. The LiNbO3/LiTaO3 samples are typically 650 nm thick and many have optical losses less than 5 dB/cm. The LiNbO3/A12O3 samples, typically 250 nm thick, have losses of 5–7 dB/cm. The higher modal intensity at the surface of the thinner films increases surface scattering losses.We have generated green light by frequency doubling in LiTaO3 and LiNbO3 thin-film planar waveguides. Phase matching was achieved by both modal dispersion and quasi-phase matching.

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