JPH0425085A - Solid-state laser device - Google Patents

Abstract

PURPOSE:To attain a miniaturized solid-state laser device which does not require dust prevention by arranging a semiconductor laser element, a solid-state laser element and a coupling optical system in the same package and providing a laser beam projecting window in the package by means of using the solid-state laser element. CONSTITUTION:Laser light 10a projected from a semiconductor laser 1 is collected and projected on the semiconductor laser element edge 3a by a coupling optical system 2. Then, a solid-state laser element 3, which is provided as the laser beam projecting window of a package 6, is excited by the laser beam 10a. Laser oscillation of the solid-state laser element 3 is generated in a laser resonator constituted by a flat mirror 3a provided on the end face of the solid- state laser element 3 by deposition, etc., and by a plano-concave mirror provided on the other end face 3b and solid-state laser beam 11 is taken out as transmitted light from the laser element end face 3b.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a solid-state laser device used in optical information processing devices such as optical information recording and reproducing devices and laser printers.

[Prior art] Fig. 2 shows, for example, CLEO, ]987, Technical
DigestTh TIO:r370mW 1
．． 06μm, cw TEMoo output
from aNd:YAG 1aser rod
end-pumped by a mono
1 is a sectional view showing a conventional edge-pumped solid-state laser device using semiconductor laser light shown in lithicdiode arrayJ; in the figure, (1) is a semiconductor laser, (1,0a) is a semiconductor I noser emitted light, (2) is a semiconductor laser; is a coupling optical system, (3) is a solid-state laser element, (3a) is a flat mirror for a laser resonator provided on the end face of the solid-state laser element (3), (3b) is a solid-state laser output light, and (4) is a heat sink. , (5) is a plano-concave mirror for laser resonator, (7)
is a metal substrate.

Next, the operation will be explained.

Laser light (10a) emitted from the semiconductor laser (1)
is the solid-state laser element end face (3a) from the coupling optical system (2).
is focused and irradiated. Next, the solid-state laser element (3) is excited by the laser beam, and laser oscillation is caused by the solid-state laser element (3) by a laser resonator composed of a flat mirror (3a) and a plano-concave mirror (5). , solid-state laser output I light (11) is extracted as transmitted light from the laser resonator mirror (5).

[Problems to be Solved by the Invention] Since the conventional solid-state laser device is configured as described above, there have been problems such as the device becoming larger and requiring dust-proof measures.

This invention was made to solve the above-mentioned problems, and aims to provide a solid-state laser device that can be miniaturized and eliminates the need for dust-proofing measures.

[Means for Solving the Problems] A solid-state laser device according to the present invention arranges a semiconductor laser element, a solid-state laser element, and a coupling optical system in the same package, and a laser beam exit window provided in the package is connected to a solid-state laser device. It is constructed using elements.

[Function] The solid-state laser device according to the present invention is dust-proofed by configuring the solid-state laser device in the package, and the device is protected from dust by using a solid-state laser element in the laser beam exit window provided in the package. Miniaturized.

[Embodiments of the invention] Hereinafter, this invention will be explained based on the drawings.

FIG. 1 is a cross-sectional side view showing a solid-state laser device according to an embodiment of the present invention, in which (1) is a semiconductor laser, (10a) is a forward emitted light beam from the semiconductor laser, and (10b) is a semiconductor laser.
is the rear emitted light of the semiconductor laser, (2) the coupling optical system, (4)
is a heat sink, (7) is a metal substrate, (6) is a package fixed to the metal substrate (7), and (6a) is a center hole (laser light emission window) provided in the package (6).
, (3) is a solid-state laser element fixed in the center hole, (
3a) is a flat mirror for a laser resonator provided on the end face of the solid-state laser element (3), (3b) is a plano-concave mirror for a laser resonator provided on the end face of the solid-state laser element (3), and (8) is a flat mirror for a laser resonator provided on the end face of the solid-state laser element (3). a stem provided on the metal substrate (9);
is a photodetector that detects the rear emitted light (10b) of the semiconductor laser.

Next, the operation will be explained.

Laser light (10a) emitted from the semiconductor laser (1)
is the solid-state laser element end face (3a) from the coupling optical system (2).
is focused and irradiated. Next, the laser beam (10a) excites the solid-state laser element (3) provided as a laser beam exit window in the package (6), and a flat mirror (3) provided by vapor deposition or the like on the end face of the solid-state laser element (3) is excited. 3a)
Laser oscillation is generated by the solid-state laser element (3) by a laser resonator composed of a plano-concave mirror (5) provided on the other end face, and the solid-state laser is emitted as transmitted light from the laser element end face (3b). Emitted light (11) is extracted.

Further, in the above embodiment, the case of the end-pumping method of the solid-state laser element has been described, but the case of the side-pumping method may also be used, and the same effects as in the above embodiment can be obtained. Furthermore, in the above embodiment, the case where optical resonator mirrors are configured on both end faces of the solid-state laser element is explained, but it goes without saying that the same effect can be obtained even when optical resonator mirrors are configured externally. do not have.

[Effects of the Invention] As described in 2 below, according to the present invention, the solid-state laser element is placed in the same package as the semiconductor laser, and the laser emission window provided in the package is configured as a part of the laser resonator. Therefore, the device can be made smaller, and since dustproof measures are not required, a highly reliable device can be obtained.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional side view showing a solid-state laser device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing a conventional solid-state laser device. (1) is a semiconductor laser, (2) is a coupling optical system, (3) is a solid-state laser element, (4) is a heat sink, (6) is a package, (7) is a metal substrate, (8) is a stem, (9) ) is a photodetector. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (2)

[Claims] (1) In a semiconductor laser light-excited solid-state laser device in which a semiconductor laser element and a solid-state laser element are combined and arranged in the same package, and the package is provided with a laser beam emission window, the laser beam emission window is connected to the solid-state laser element. A solid-state laser device comprising: (2) The solid-state laser device according to item 1, wherein a mirror effect is formed on both end surfaces or one end surface of the solid-state laser element.