公开(公告)号：EP2175534A4

公开(公告)日：2010-08-25

申请号：EP07805878

申请日：2007-07-30

Applicant: MITSUBISHI ELECTRIC CORP

Inventor： YANAGISAWA TAKAYUKI ,  HIRANO YOSHIHITO ,  YAMAMOTO SHUHEI ,  KOYATA YASUHARU

IPC: H01S3/10

CPC classification number: H01S3/109 ,  H01S3/09415 ,  H01S3/1611 ,  H01S3/1673

公开(公告)号：EP2175533A4

公开(公告)日：2017-12-06

申请号：EP07791484

申请日：2007-07-27

Applicant: MITSUBISHI ELECTRIC CORP

Inventor： YANAGISAWA TAKAYUKI ,  HIRANO YOSHIHITO ,  YAMAMOTO SHUHEI ,  KOYATA YASUHARU

IPC: H01S3/063 ,  H01S3/06 ,  H01S3/10 ,  H01S3/13 ,  H01S3/16

CPC classification number: H01S3/0632 ,  H01S3/0612 ,  H01S3/0625 ,  H01S3/10061 ,  H01S3/1308 ,  H01S3/1611 ,  H01S3/1673

Abstract: A planar waveguide laser device forms a waveguide by a plate-like laser medium (1) having birefringence and clad (2a, 2b) attached to at least one of the surfaces of the laser medium (1) perpendicular to its thickness direction, amplifies laser light by a gain produced by excitation light incident on the laser medium (1), and performs laser oscillation. The laser medium (1) is formed of a material having an optic axis on a cross section perpendicular to the light axis, which is the laser travelling direction. The clad (2a, 2b) is formed of a material having a refractive index in a range between refractive indexes of two polarized lights that travel along the light axis in the laser medium (1) and have oscillation surfaces that are orthogonal to each other. The planar waveguide laser device readily oscillates linearly polarized laser light.

公开(公告)号：EP2590276A4

公开(公告)日：2014-01-15

申请号：EP10861126

申请日：2010-12-21

Applicant: MITSUBISHI ELECTRIC CORP

Inventor： MIYAMOTO NORIYUKI ,  YAMAMOTO SHUHEI ,  YANAGISAWA TAKAYUKI ,  HIRANO YOSHIHITO

IPC: H01S3/06 ,  H01S3/04 ,  H01S3/042 ,  H01S3/063 ,  H01S3/08 ,  H01S3/23

CPC classification number: H01S3/04 ,  H01S3/042 ,  H01S3/0632 ,  H01S3/0635 ,  H01S3/08072 ,  H01S3/2308 ,  H01S3/2383

Abstract: Provided is a mode control waveguide-type laser device with a broadened control range of the focal distance of a generated thermal lens and with improved reliability. The mode control waveguide-type laser device includes: a laser medium which is planar and has a waveguide structure in a thickness direction of a cross section perpendicular to an optical axis (6), for generating gain with respect to laser light; a cladding bonded onto one surface of the laser medium; and a heat sink (2) bonded via the cladding onto the one surface side of the laser medium. The laser medium generates a lens effect due to a refractive index distribution, and the laser light oscillates in a waveguide mode in the thickness direction, and oscillates in a spatial mode due to the lens effect in a direction perpendicular to the optical axis and the thickness direction. The refractive index distribution within the laser medium is created by generating a desired temperature distribution in the laser medium depending on a junction area of the cladding and the heat sink (2) .

公开(公告)号：EP2339396A4

公开(公告)日：2012-03-07

申请号：EP09816109

申请日：2009-09-17

Applicant: MITSUBISHI ELECTRIC CORP

Inventor： AKINO YOSUKE ,  HIRANO YOSHIHITO ,  YANAGISAWA TAKAYUKI ,  YAMAMOTO SHUHEI ,  NAGATSUKA TSUTOMU ,  ANDO TOSHIYUKI

IPC: G02F1/35 ,  G02F1/355 ,  G02F1/377

CPC classification number: G02F1/37 ,  G02F1/3501 ,  G02F1/3558 ,  G02F1/377 ,  G02F1/3775 ,  G02F2001/3505 ,  G02F2001/3548 ,  G02F2201/12 ,  G02F2202/20 ,  G02F2203/21 ,  H01S3/109

公开(公告)号：EP2793077A4

公开(公告)日：2015-07-22

申请号：EP11877446

申请日：2011-12-12

Applicant: MITSUBISHI ELECTRIC CORP

Inventor： MIYAMOTO NORIYUKI ,  YANAGISAWA TAKAYUKI ,  YAMAMOTO SHUHEI ,  YABE MITORU ,  INOUE YOKO

IPC: G03B21/14 ,  F21V8/00 ,  G02B6/00 ,  G02B27/48 ,  G03B21/20 ,  H04N9/31

CPC classification number: G03B21/208 ,  G02B6/0006 ,  G02B27/48 ,  G03B21/2033 ,  H04N9/3152

公开(公告)号：EP2395611A4

公开(公告)日：2017-10-25

申请号：EP09839643

申请日：2009-02-05

Applicant: MITSUBISHI ELECTRIC CORP

Inventor： YAMAMOTO SHUHEI ,  AKINO YOSUKE ,  YANAGISAWA TAKAYUKI ,  HIRANO YOSHIHITO

IPC: H01S3/063 ,  H01S3/00 ,  H01S3/04 ,  H01S3/042 ,  H01S3/08 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/102 ,  H01S3/23 ,  H01S5/40 ,  H04N9/31

CPC classification number: H01S3/042 ,  H01S3/0092 ,  H01S3/0405 ,  H01S3/0632 ,  H01S3/0804 ,  H01S3/08072 ,  H01S3/094076 ,  H01S3/09415 ,  H01S3/1028 ,  H01S3/2383 ,  H01S5/4025 ,  H04N9/3161

Abstract: A plane waveguide type laser according to the present invention includes: a plate-shaped laser medium (5); a semiconductor laser (1) which causes excitation light to enter an end surface (5a) of the laser medium (5); first and second claddings (4a and 4b) which are bonded to lower and upper surfaces of the laser medium (5), respectively, to form a waveguide in a vertical direction; a comb heat sink (2) bonded to a lower surface of the first cladding (4a); and thermal lens producing means (20) bonded to an upper surface of the second cladding (4b). In this structure, laser oscillation in the vertical direction is performed in a waveguide mode of the laser medium (5), and the thermal lens producing means (20) forms a periodic lens effect in the laser medium (5) to perform laser oscillation in a lateral direction in a plurality of resonant modes. Therefore, a resonator having a small round-trip loss may be formed without depending on a size of a thermal lens produced by excitation, and hence a rising characteristic of a pulse operation or a CW operation may be smoothed to obtain high-power stable output.

公开(公告)号：EP2799823A4

公开(公告)日：2015-09-23

申请号：EP11878355

申请日：2011-12-27

Applicant: MITSUBISHI ELECTRIC CORP

Inventor： SHODA FUMIO ,  FUKAHORI HIDENORI ,  YANAGISAWA TAKAYUKI ,  YABE MITORU ,  NISHIMURA TETSUYA ,  YAMAMOTO SHUHEI ,  INOUE YOKO ,  FUNAKURA TETSUO

IPC: G01J1/02 ,  G01J1/42

CPC classification number: G01J1/4257 ,  G01J1/0407 ,  G01J1/0411 ,  G01J1/0414 ,  G01J1/0429 ,  G01J1/0448 ,  G01J1/0474 ,  G01J1/22

公开(公告)号：EP2767809A4

公开(公告)日：2015-08-12

申请号：EP11874105

申请日：2011-10-11

Applicant: MITSUBISHI ELECTRIC CORP

Inventor： SHODA FUMIO ,  FUKAHORI HIDENORI ,  YANAGISAWA TAKAYUKI ,  YABE MITORU ,  NISHIMURA TETSUYA ,  YAMAMOTO SHUHEI ,  INOUE YOKO ,  FUNAKURA TETSUO

IPC: G01J1/02

CPC classification number: G01J1/0448 ,  G01J1/0429 ,  G01J1/4257

公开(公告)号：EP2192443A4

公开(公告)日：2011-05-25

申请号：EP07807144

申请日：2007-09-12

Applicant: MITSUBISHI ELECTRIC CORP

Inventor： KOYATA YASUHARU ,  YANAGISAWA TAKAYUKI ,  YAMAMOTO SHUHEI ,  HIRANO YOSHIHITO ,  NAGATSUKA TSUTOMU

IPC: G02F1/37 ,  H01S3/06 ,  H01S3/109

CPC classification number: G02F1/3544 ,  G02F1/3775 ,  H01S3/0092

公开(公告)号：EP1638178A4

公开(公告)日：2007-08-08

申请号：EP03817205

申请日：2003-06-20

Applicant: MITSUBISHI ELECTRIC CORP

Inventor： YAMAMOTO SHUHEI ,  YANAGISAWA TAKAYUKI ,  HIRANO YOSHIHITO

IPC: H01S3/06 ,  H01S3/04 ,  H01S3/042 ,  H01S3/063 ,  H01S3/08 ,  H01S3/081 ,  H01S3/0941 ,  H01S3/16 ,  H01S5/00 ,  H01S5/40

CPC classification number: H01S3/0941 ,  H01S3/0405 ,  H01S3/0407 ,  H01S3/042 ,  H01S3/0632 ,  H01S3/0815 ,  H01S3/094084 ,  H01S3/09415 ,  H01S3/1618 ,  H01S3/1643 ,  H01S5/005 ,  H01S5/4012 ,  H01S5/4025 ,  H01S2301/02

Abstract: A solid laser excitation module (1) comprising a flat additive-free medium (4) that is provided on the surface side opposite to the reflection surface of a thin solid laser medium (3), and is close in refractive index to the medium (3) and free from an active medium, wherein an excitation light is reflected off the reflection surface of the medium (3) and the reflection surface, on the surface side opposite to the medium (3), of the additive-free medium (4) to excite the thin solid laser medium (3) and allow a laser beam to be extracted.