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Intracavity-frequency-multiplication-optic-parameter-oscillator-based femto-second near-infrared laser light source and method

A technology of optical parameters and intracavity frequency doubling, applied in lasers, laser components, phonon exciters, etc., can solve problems such as uncompact structure, high price, and non-continuously adjustable wavelength, and achieve compact structure and low cost , the effect of simple structure

Inactive Publication Date: 2015-08-19
XIDIAN UNIV +1
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Problems solved by technology

[0003] The purpose of the present invention is to provide a femtosecond near-infrared laser light source and method based on an intracavity frequency-doubling optical parametric oscillator, aiming to solve the problems of existing near-infrared femtosecond lasers such as uncompact structure, high price, and non-continuous wavelength. adjustable question

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[0052] exist figure 1 Among them, the all-solid-state femtosecond mode-locked Yb laser 1 is used to generate the pump laser with femtosecond pulse width, after passing through the optical isolator 2 and the half-wave plate 3, it is focused into the first PPLN crystal 6 through the focusing lens 4; the second A concave mirror 5, a second concave mirror 7, a third concave mirror 8, a fourth concave mirror 10 and an output mirror 11 form a parametric oscillation resonant cavity; the second PPLN crystal 9 is placed on the third concave mirror 8 and the fourth concave mirror 10 The center of the formed confocal structure is used to generate frequency doubling in the cavity; wherein the first concave mirror 5 and the second concave mirror 7 form a confocal tight-focus cavity, so that the signal beam waist size on the first PPLN crystal 6 is the same as The beam waist size of the pump light matches; the third concave mirror 8 and the fourth concave mirror 10 form another confocal str...

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Abstract

The invention discloses an intracavity-frequency-multiplication-optic-parameter-oscillator-based femto-second near-infrared laser light source and a method. The light source comprises an all-solid-state femto-second mode-locking Yb laser, an isolator, a half-wave plate, a focusing lens, a first concave mirror, a first PPLN crystal, a second concave mirror, a three concave mirror, a second PPLN crystal, a fourth concave mirror, and an output coupling mirror, wherein the units are successive placed. According to the invention, advantages of high output power, compact structure, and low cost of the all-solid-state femto-second mode-locking Yb laser are used for realizing coherent femto-second near-infrared laser with continuous tunable wavelengths from 1.4 to 1.8 microns and 0.7 to 0.9 microns. Compared with the traditional mode-locking-titanium-sapphire laser generating a near-infrared laser light source with the wavelength from 0.7 to 0.9 microns, the provided intracavity-frequency-multiplication-optic-parameter-oscillator-based femto-second near-infrared laser light source has advantages of simple structure, stable performance, and low price and the like.

Description

technical field [0001] The invention belongs to the field of ultrafast laser technology, and in particular relates to a femtosecond near-infrared laser light source and method based on an intracavity frequency doubling optical parametric oscillator. Background technique [0002] After decades of research on the generation of femtosecond laser pulses, people have successfully used the principles of Kerr lens mode-locking (KLM) and SESAM passive mode-locking to obtain near-infrared femtosecond pulses from visible light to about 2 μm in many kinds of gain media. pulse. Compared with lasers that use population inversion to provide laser gain, femtosecond optical parametric oscillators (OPO) use pump light, signal The principle of mutual coupling of light and idle light energy to generate ultrashort laser pulses has unique advantages: First, the femtosecond OPO pumped by synchronous pumping can use the same crystal and the same femtosecond pumping source to simultaneously Gener...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/098H01S3/081H01S3/094H01S3/109
Inventor 魏志义田文龙朱江峰王兆华
Owner XIDIAN UNIV
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