Gradient periodically polarised lithium niobate

FIELD: physics, instrument-making.

SUBSTANCE: invention relates to laser engineering. Lithium niobate-based monocrystalline material with inhomogeneous lithium distribution according to a given law along an active laser element is characterised by the following structural formula: Lia(z)Nbb(z)O3 where: a(z)=p*F(z), where 0.99≤a(z)≤1; b(z)=a(z)/R, where R=Li/Nb, where 0.93≤b(z)≤0.96; F(z)=th(z); p=49.98 at % or 0.9996 pts.at; R=k*x, 0.94≤x≤0.96, z is a spatial coordinate directed along the length of the crystal (cm) in a reference system originating at the input face. The disclosed material has high optical efficiency.

EFFECT: invention increases efficiency of periodically polarised lithium niobate in the infrared spectrum.

2 dwg, 2 tbl

 



 

Same patents:

FIELD: laser engineering.

SUBSTANCE: proposed solid-state pulsed laser system designed for operation in subnanosecond and nanosecond frequency bands incorporating provision for converting radiation frequency into higher harmonics in visible and ultraviolet spectrum ranges has microchip laser with passive gate of YAG:Cr4+ crystal, two-port amplifier, and nonlinear components for converting radiation frequency into higher harmonics. In addition, it is provided with preamplifier. Introduced into preamplifier optical system on one end of active element are first nontransmitting mirror, input polarizer, electrooptic element, 90-deg. polarization-plane shifter installed on first two-position shifting device, prism, output polarizer, turning mirror, second nontransmitting mirror covered with first section of double-section screen, and third nontransmitting mirror. Electrooptic element is introduced in optical system of two-port amplifier.

EFFECT: ability of generating unidirectional digitally frequency-tuned pulses with smoothly varying power.

1 cl, 1 dwg, 1 tbl

FIELD: laser engineering.

SUBSTANCE: proposed solid-state pulsed laser system designed for operation in subnanosecond and nanosecond frequency bands incorporating provision for converting radiation frequency into higher harmonics in visible and ultraviolet spectrum ranges has microchip laser with passive gate of YAG:Cr4+ crystal, two-port amplifier, and nonlinear components for converting radiation frequency into higher harmonics. In addition, it is provided with preamplifier. Introduced into preamplifier optical system on one end of active element are first nontransmitting mirror, input polarizer, electrooptic element, 90-deg. polarization-plane shifter installed on first two-position shifting device, prism, output polarizer, turning mirror, second nontransmitting mirror covered with first section of double-section screen, and third nontransmitting mirror. Electrooptic element is introduced in optical system of two-port amplifier.

EFFECT: ability of generating unidirectional digitally frequency-tuned pulses with smoothly varying power.

1 cl, 1 dwg, 1 tbl

FIELD: physics, instrument-making.

SUBSTANCE: invention relates to laser engineering. Lithium niobate-based monocrystalline material with inhomogeneous lithium distribution according to a given law along an active laser element is characterised by the following structural formula: Lia(z)Nbb(z)O3 where: a(z)=p*F(z), where 0.99≤a(z)≤1; b(z)=a(z)/R, where R=Li/Nb, where 0.93≤b(z)≤0.96; F(z)=th(z); p=49.98 at % or 0.9996 pts.at; R=k*x, 0.94≤x≤0.96, z is a spatial coordinate directed along the length of the crystal (cm) in a reference system originating at the input face. The disclosed material has high optical efficiency.

EFFECT: invention increases efficiency of periodically polarised lithium niobate in the infrared spectrum.

2 dwg, 2 tbl

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