# US 5,351,259 A · Semiconductor laser-pumped solid-state laser with plural beam output

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- Number: US 5,351,259 A
- Document ID: US5351259A
- Status: Granted
- Kind: A
- Application number: 07/965,716
- Filed: 1992-10-23
- Granted: 1994-09-27
- Earliest claimed: 1991-10-24
- Assignees: Mitsubishi Denki Kabushiki Kaisha
- Inventors: Akira Ishimori; Takashi Yamamoto; Tetsuo Kojima
- Web page: https://patentgrep.com/patent/US5351259A

## CPC

- H01S 3/09415: {the pumping beam being parallel to the lasing mode of the pumped medium, e.g. end-pumping}
- H01S 3/0606: {with polygonal cross-section, e.g. slab, prism (H01S3/0604 takes precedence)}
- H01S 3/08072: {Thermal lensing or thermally induced birefringence; Compensation thereof}
- H01S 3/0941: of a laser diode
- H01S 3/2383: {Parallel arrangements}
- H01S 5/4025: {Array arrangements, e.g. constituted by discrete laser diodes or laser bar (H01S5/42 takes precedence)}
- H01S: DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL

## Abstract

A semiconductor-laser-pumped solid-state laser apparatus having a semiconductor laser device, a solid state laser medium, and laser resonators. The semiconductor laser device has a plurality of emission points which are arranged on a straight line and from which pump light is generated. The laser resonators are disposed in correspondence with the emission points. A plurality of solid state laser beams can be generated by using one solid state laser medium.

## Claims

### Claim 1

A semiconductor-laser-pumped solid-state laser apparatus comprising:
a semiconductor laser device for generating pump light;
a solid state thin plate laser medium pumped by the pump light disposed adjacent to said semiconductor laser device, said laser medium efficiently confining the pump light therein by repeated reflection of the pump light on both an upper and lower surface of said laser medium; and
laser resonator means having a pair of reflecting surfaces facing each other with said solid state laser medium interposed therebetween, said laser resonator means being for emitting a plurality of laser light beams;
wherein said semiconductor laser device has a plurality of emission points which are arranged on a straight line and from which the pump light is generated, and said laser resonator means is disposed in correspondence with the emission points such that said plurality of laser light beams are emitted.

### Claim 2 (depends on 1)

A laser apparatus according to claim 1 further comprising a microlens disposed so as to receive said laser light beams emitted by said laser resonator means for forming the laser light into a predetermined shape.

### Claim 3 (depends on 1)

A laser apparatus according to claim 1 further comprising a two-dimensional array of microlenses for emitting a plurality of beams of the laser light, said microlenses being provided in said laser resonator means to generate a two-dimensional array of laser beams.

### Claim 4 (depends on 1)

A laser apparatus according to claim 1 further comprising a non-linear optical element provided in said laser resonator means to perform wavelength conversion.

### Claim 5 (depends on 1)

A laser apparatus according to claim 1 wherein said semiconductor laser device has a plurality of emission points arranged two dimensionally, the pump light from each emission point being emitted and converged to said solid state laser medium through a microlens array arranged two-dimensionally.

### Claim 6 (depends on 1)

The laser according to claim 1 wherein said pair of reflecting surfaces comprise a pair of reflecting mirrors.

### Claim 7 (depends on 1)

The laser according to claim 1 wherein said pair of reflecting surfaces comprise a pair of surfaces having reflecting coatings.

### Claim 8

A semiconductor-laser-pumped solid-state laser apparatus comprising:
a semiconductor laser device for generating pump light;
a solid state thin plate laser medium in which the pump light is confined by internal reflection and which is pumped by the pump light; and
laser resonator means having a pair of reflecting surfaces facing each other with said solid state laser medium interposed therebetween, said laser resonator means being for emitting a plurality of beams of laser at a laser beam emitting said thereof;
said laser resonator means further having at least one microlens disposed in an output path of a respective one of said plurality of beams of laser light.

### Claim 9 (depends on 8)

A laser apparatus according to claim 8 further comprising a non-linear optical element provided in said laser resonator means to perform wavelength conversion.

### Claim 10 (depends on 8)

The laser according to claim 8 wherein said pair of reflecting surfaces comprise a pair of reflecting mirrors.

### Claim 11 (depends on 8)

The laser according to claim 8 wherein said pair of reflecting surfaces comprise a pair of surfaces having reflecting coatings.