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1. 发明公开

EP0169567A3 Semiconductor laser device 失效
公开(公告)号：EP0169567A3
公开(公告)日：1988-09-07
申请号：EP85109337
申请日：1985-07-25
申请人： NEC CORPORATION
发明人： Yamaguchi, Masayuki , Mito, Ikuo , Kitamura, Mitsuhiro
IPC分类号： H01S03/10 , H01S03/08 , H01S03/06
CPC分类号： H01S5/12 , H01S5/0264 , H01S5/028 , H01S5/06258 , H01S5/1203 , H01S5/227 , H01S5/2275 , H01S5/2277 , H01S5/32391
摘要： The semiconductor laser device consists of a laser region (2) provided with a stratified structure having an active layer (13) and a diffraction grating (1) provided in the vicinity of said active layer (13), and a tuning region (3) having an optical waveguide layer optically coupled to aid laser region (2). The light emitting end facet on said tuning region (3) constitutes a high reflectivity structure having a light reflectivity of 50 % or above. The semiconductor laser permits continuous wavelength tuning.

2. 发明公开

EP0195425A3 Distributed feedback semiconductor laser 失效
标题翻译：分布式反馈半导体激光器
公开(公告)号：EP0195425A3
公开(公告)日：1987-12-09
申请号：EP86103692
申请日：1986-03-19
申请人： NEC CORPORATION
发明人： Yamaguchi, Masayuki
IPC分类号： H01S03/19 , H01S03/06
CPC分类号： H01S5/12 , H01S5/028 , H01S5/10 , H01S5/124 , H01S5/1243
摘要： The distributed feedback semiconductor laser (DFB-laser) comprises a stripe-shaped light emitting region, a periodic corrugation structure disposed in the advancing direction of light and adjoining the stripe-shaped light emitting region, and facets of different reflectivities at the ends of the light emitting region. The periodic corrugation structure has a phase shift region located nearer to the end facet of higher reflectivity. The phase shift region is adapted to cause a desired optical phase shift to the light travelling therein. In the DFB, it is particularly preferable thatthe length of the phase shift region is set to (1+2n)/4 times (n:0 or positive integer) as much as the wavelength of the light travelling the phase shift region or to π/2 times the inverse of the difference in propagation constant between when the light is travelling the phase shift region and when travelling the other regions of the periodic corrugation structure, so that the optical phase shift caused by the phase shift region may be π/2. This DFB-laser has ends of different reflectivities and is capable of a stable single wavelength oscillation.

3. 发明公开

EP0149462A3 Distributed-feedback semiconductor laser 失效
标题翻译：分布式反馈半导体激光器
公开(公告)号：EP0149462A3
公开(公告)日：1987-05-27
申请号：EP85100132
申请日：1985-01-08
申请人： NEC CORPORATION
发明人： Yamaguchi, Masayuki
IPC分类号： H01S03/19 , H01S03/06
CPC分类号： H01S5/12
摘要： The distributed-feedback (DFB) semiconductor laser diode comprises an active layer (12) emitting light rays upon injection of an electric current; and an optical waveguide (20) adjoining the active layer, for guiding the light rays together with the active layer (12). The optical waveguide (20) comprises a first semiconductor layer (13) formed in the vicinity of the active layer (12) and having a greater bandgap than that of the active layer (12), whose thickness varies in a corrugation of a prescribed cycle in the direction of the active layer (12), and a second semiconductor layer (14) having a bandgap smaller than that of the first semiconductor layer (13), but greater than that of the active layer (12), and so formed as to confirm the corrugation of the first semiconductor layer (13). First and second cladding layers adjoin the active layer (12) and the optical waveguide (20), respectively, and have bandgaps greater than those of the active layer (12) and of the second semiconductor layer (14). First and second electrodes inject an electric current into the active layer (12) in which a PN junction is formed by forward biasing. Light rays emitted from the active layer (12) interact with the diffraction grating formed by the boundary of the corrugation to receive positive feedback, resulting in laser oscillation in a single longitudinal mode (Fig. 1C).

4. 发明公开

EP0208189A3 Optical fiber laser 失效
标题翻译：光纤激光
公开(公告)号：EP0208189A3
公开(公告)日：1988-12-07
申请号：EP86108550
申请日：1986-06-23
申请人： POLAROID CORPORATION
发明人： Hakimi, Farhad , Po, Hong , Snitzer, Elias
IPC分类号： H01S03/06 , H01S03/08 , H01S03/10 , H01S03/17 , H01S03/094
CPC分类号： H01S3/09415 , H01S3/067 , H01S3/08059 , H01S3/094038 , H01S3/0941 , H01S3/105 , H01S3/1062
摘要： An optical fiber laser (10) comprising a gain cavity in the form of a single mode optical fiber (12) with integrally formed reflective end sections (18, 20) for provision of feedback. One end section (18) is an etalon for modifying the gain cavity resonant characteristics and intensity modulation, and the other end section (20) is used to alter gain cavity effective length to tune and frequency modulate. The emission spectrum of the laser gain material, which is preferably neodymium oxide incorporated in a silicate glass core, along with the etalon section reflection, pump energy level, and gain cavity length cooperate so that lasing takes place over just a single line of narrow width or over more than one line within a narrow band. Electro-optic material in the end sections permit output frequency and amplitude to be selectively activated in response to the application of applied voltages.

5. 发明公开

EP0136047A3 Fiber optic dye amplifier 失效
标题翻译：光纤透镜放大器
公开(公告)号：EP0136047A3
公开(公告)日：1987-09-30
申请号：EP84305644
申请日：1984-08-20
申请人： THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY
发明人： Sorin, Wayne Victor , Shaw, Herbert John , Digonnet, Michel J. F. , Bergh, Ralph A. , Kolner, Brian H.
IPC分类号： H01S03/06 , H01S03/20 , H01S03/23 , G02B06/16
CPC分类号： G02B6/2821 , H01S3/06708 , H01S3/20 , H01S3/213
摘要： A fiber optic amplifier is disclosed, comprising a fiber optic, monomode waveguide (20) having a core (64) and cladding (66). A portion (70) of the cladding (66) over a predetermined region is removed and replaced by an active medium (30) capable of absorbing light energy at a first wavelength and emitting light energy at a second wavelength. The active medium (30) is a lasing dye that has an index of refraction adjusted to be slightly less than the index of refraction of the fiber core (64). The amount of cladding (66) removed is adjusted such that a predetermined amount of penetration of the evanescent field from a pump light signal (36) coupled into an end of the fiber (20) penetrates the active medium (30). A probe signal (38) to be amplified causes stimulated emission from the excited dye molecules by penetration of its evanescent field into the dye (30) in the region where the cladding is removed. In the preferred embodiment a recirculating pump (110) is used to circulate dye (30) through a cavity (112) placed over the fiber (20) where the cladding portion (70) is removed. The dye molecules in contact with the surface (72) formed by removal of the cladding (66) are continually changed. A temperature control unit (110) maintains the temperature of the dye (30) such that its index of refraction remains tuned to an amount just less than the index of refraction of the core (64).

6. 发明公开

EP0182508A3 A semiconductor laser device 失效
标题翻译：半导体激光器件
公开(公告)号：EP0182508A3
公开(公告)日：1987-09-02
申请号：EP85307630
申请日：1985-10-22
申请人： SHARP KABUSHIKI KAISHA
发明人： Kaneiwa, Shinji , Takiguchi, Haruhisa , Yoshida, Toshihiko , Matsui, Sadayoshi
IPC分类号： H01S03/19 , H01S03/06
CPC分类号： H01S5/32308 , H01S5/12 , H01S5/3211
摘要： A semiconductor laser device for laser oscillation at a wavelength in the range of 660 nm to 890 nm comprising an active layer (3. 14) consisting of Ga 1-x Al x As (0≤x ≤0.4) or In 1-y Ga Y P 1-Z As z (0.51 ≤y≤1, 0≤z≤1, and z=2.04y-1.04) and a layer (4, 13 with a diffraction grating (44, 33) thereon consisting of ln 1-y Ga y P 1-z As (z=2.04y-1.04) which is adjacent to said active layer (3, 14).

7. 发明公开

EP0178497A3 Method for producing in an integrated form a DFB laser coupled with a strip waveguide on a substrate 失效
标题翻译：在衬底上生产与带状波纹管耦合的DFB激光器的集成形式的方法
公开(公告)号：EP0178497A3
公开(公告)日：1987-08-26
申请号：EP85112053
申请日：1985-09-24
申请人： Siemens Aktiengesellschaft
发明人： Amann, Markus-Christian, Dr.-Ing. , Mahlein, Hans F., Dr. rer. nat. , Stegmüller, Bernhard, Dipl.-Ing. , Thulke, Wolfgang, Dr. rer. nat. , Winzer, Gerhard, Dr.-Ing. , Wolff, Ulrich, Dipl.-Phys.
IPC分类号： H01S03/06 , H01L33/00 , G02B06/42
CPC分类号： H01S5/12 , H01S5/026 , H01S5/1032 , H01S5/2231 , H01S5/32391

8. 发明公开

EP0267667A3 Distributed feedback laser 失效
标题翻译：分布式反馈激光
公开(公告)号：EP0267667A3
公开(公告)日：1988-11-09
申请号：EP87305603
申请日：1987-06-24
申请人： STC PLC
发明人： Plumb, Richard Gordon Samuel
IPC分类号： H01S03/103 , H01S03/06 , H01S03/19
CPC分类号： H01S5/0625 , H01S5/0425 , H01S5/06255 , H01S5/06258 , H01S5/12 , H01S5/1215
摘要： A distributed feedback (DFB) laser having a divided electrode structure (70,71,72) on one surface by means of which the injected current distribution in the laser may be modified so as to enable independent control of laser output amplitude and wavelength.
摘要翻译：一种分布式反馈（DFB）激光器，其在一个表面上具有分开的电极结构（70,71,72），借此可以修改激光器中注入的电流分布，以便能够独立控制激光输出幅度和波长。

9. 发明公开

EP0187718A3 A distributed feedback semiconductor laser device 失效
标题翻译：分布式反馈半导体激光器件分布式反馈半导体激光器件
公开(公告)号：EP0187718A3
公开(公告)日：1988-06-01
申请号：EP86300127
申请日：1986-01-09
申请人： SHARP KABUSHIKI KAISHA
发明人： Yoshida, Toshihiko , Takiguchi, Haruhisa , Kaneiwa, Shinji 101 Kyobata Mansion , Matsui, Sadayoshi
IPC分类号： H01S03/19 , H01S03/08 , H01S03/06
CPC分类号： H01S5/1228 , H01S5/2232
摘要： A distributed feedback semiconductor laser device comprises an active layer positioned between a first cladding layer and a second cladding layer, and an absorption layer positioned between said active layer and one of said cladding layers, said absorption layer having grooves to form a diffraction grating with a given periodicity in the direction of the propagation of laser light.

10. 发明公开

EP0149886A3 Optical amplifiers 失效
标题翻译：光放大器
公开(公告)号：EP0149886A3
公开(公告)日：1987-10-07
申请号：EP84307101
申请日：1984-10-17
申请人： STC PLC
发明人： Byron, Kevin Christopher
IPC分类号： H01S03/06 , H01S03/30 , H01S03/091
CPC分类号： H01S3/302 , H01S3/094042
摘要： Amplification in an optical fibre transmission system at a wavelength λ s is obtained by coupling the fibre of the transmission system to the input of a single-crystal fibre laser (1), the output of which is coupled to a length of optical fibre (2) comprising an amplifier fibre. The single-crystal fibre laser and amplifier fibre comprise an optical amplifier. The fibre laser is pumped by LEDs (3) and emits pump signals at a wavelength λ p , the signal wavelength λ 5 being one Stokes shift away from the pump wavelength λ s . When the power emerging from the fibre laser at wavelength Xp is large enough, the pump signal interacts with the signal of wavelengths λ s in the amplifier fibre (2) and gain is obtained at the signal wavelength λ 8 .

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