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11. 发明授权

US5657153A Optical amplifier with complementary modulation signal inputs 失效
标题翻译：具有互补调制信号输入的光放大器
公开(公告)号：US5657153A
公开(公告)日：1997-08-12
申请号：US408030
申请日：1995-03-21
申请人： John Endriz , David F. Welch , Robert G. Waarts , Steven Sanders , Donald R. Scifres
发明人： John Endriz , David F. Welch , Robert G. Waarts , Steven Sanders , Donald R. Scifres
IPC分类号： H04B10/17 , H01S3/00 , H04B10/04
CPC分类号： H04B10/291 , H04B10/2912 , H01S3/005 , H01S3/06712 , H01S3/06754 , H01S3/10015 , H01S3/2383 , H01S5/06216 , H01S5/4087
摘要： In an optical transmission medium, such as a fiber amplifier, two optically distinguishable signals with complementary modulation are both inputted into the amplifying medium for encoding information, particularly a serial stream of digital data, or alternatively, redundant encoding of pulses. The gain profile in the medium is preferably maintained approximately constant at all times, so that whichever amplified signal is used as the primary information carrier, its output intensity will be substantially stable from pulse to pulse, independent of recent pulse history. The two complementary signals may have different orthogonal linear polarizations or wavelengths with the same stimulated emission cross-section, so that the population inversion profile stays constant, whichever signal happens to be on at a given moment. The two signals may be derived from separate intensity modulated laser diode signal sources, from a single laser diode signal source switched between two emission wavelengths, or from a single laser diode with constant emission coupled to a directional coupler directing two complementary polarized light signals into the fiber amplifying medium.
摘要翻译：在诸如光纤放大器的光传输介质中，具有互补调制的两个光学可区分信号都被输入到用于对信息进行编码的放大媒体，特别是串行数字数据流，或备选地，脉冲的冗余编码。介质中的增益分布优选总是保持近似恒定，因此无论使用哪个放大信号作为主信息载体，其输出强度将基本上与脉冲相比稳定，与最近的脉冲历史无关。两个互补信号可以具有不同的具有相同受激发射横截面的正交线性偏振或波长，使得群体反转谱保持恒定，无论哪个信号在给定时刻发生什么信号。两个信号可以从单独的强度调制的激光二极管信号源获得，来自在两个发射波长之间切换的单个激光二极管信号源，或者来自具有恒定发射的单个激光二极管耦合到定向耦合器，其将两个互补偏振光信号引入到光纤放大介质。

12. 发明授权

US5539571A Differentially pumped optical amplifer and mopa device 失效
标题翻译：差分泵浦光学放大器和mopa器件
公开(公告)号：US5539571A
公开(公告)日：1996-07-23
申请号：US202359
申请日：1994-02-28
申请人： David F. Welch , Donald R. Scifres , Robert G. Waarts , David G. Mehuys , Amos A. Hardy , Ross A. Parke
发明人： David F. Welch , Donald R. Scifres , Robert G. Waarts , David G. Mehuys , Amos A. Hardy , Ross A. Parke
IPC分类号： H01S5/026 , H01S5/042 , H01S5/062 , H01S5/10 , H01S5/12 , H01S5/125 , H01S5/16 , H01S5/187 , H01S5/20 , H01S5/50 , H01S3/00
CPC分类号： H01S5/0425 , H01S5/026 , H01S5/20 , H01S5/50 , H01S2301/163 , H01S2301/166 , H01S5/0267 , H01S5/0422 , H01S5/06243 , H01S5/1014 , H01S5/1053 , H01S5/1064 , H01S5/1085 , H01S5/12 , H01S5/125 , H01S5/16 , H01S5/187 , H01S5/2036 , H01S5/5018
摘要： An optical amplifier semiconductor device which is differentially pumped and a master oscillator power amplifier (MOPA) device employing such an amplifier. The amplifier allows the light propagating therein to diverge along at least part of its length, and may be a flared amplifier having a gain region that increases in width toward its output at a rate that equals or exceeds the divergence of the light. The amplifier is pumped with a current density at its input end which is smaller than the current density used to pump the output end for maintaining coherence of the beam to high power levels. Differential pumping may be both longitudinal and lateral within the amplifier. A single mode preamplifier section may be optically coupled to the input end of the amplifier. The amplifier input may have a width which is the same as or wider than that of the preamplifier output. The preamplifier may have a constant mode width or may be tapered to alter the divergence of the beams provided to the amplifier section. The laser oscillator in the MOPA device may be a single mode DBR laser diode monolithically integrated on the same substrate as the optical amplifier. Laser sources external to an amplifier chip may also be used. The input portion of the amplifier or the preamplifier section, if present, may be modulated. The laser oscillator might also be modulated if it has a high Q cavity. Tunable laser oscillators are also disclosed.
摘要翻译：差分泵浦的光放大器半导体器件和采用这种放大器的主振荡器功率放大器（MOPA）器件。放大器允许其中传播的光沿其长度的至少一部分发散，并且可以是具有增益区域的扩张放大器，该增益区域以等于或超过光的发散度的速率朝向其输出增加。放大器在其输入端以电流密度泵送，该电流密度小于用于泵浦输出端的电流密度，以将光束的相干性保持在高功率水平。差分泵浦可以在放大器内部纵向和横向两者。单模前置放大器部分可以光耦合到放大器的输入端。放大器输入可以具有与前置放大器输出的宽度相同或更宽的宽度。前置放大器可以具有恒定的模式宽度，或者可以是锥形的，以改变提供给放大器部分的光束的发散度。 MOPA器件中的激光振荡器可以是单模DBR激光二极管，其单片集成在与光放大器相同的衬底上。还可以使用放大器芯片外部的激光源。放大器或前置放大器部分的输入部分（如果存在）可以被调制。如果激光振荡器具有高Q腔，则也可能会被调制。还公开了可调谐激光振荡器。

13. 发明授权

US5159604A Antiguided semiconductor laser array with edge reflectors 失效
标题翻译：具有边缘反射器的反射半导体激光器阵列
公开(公告)号：US5159604A
公开(公告)日：1992-10-27
申请号：US737463
申请日：1991-07-29
申请人： David G. Mehuys , Amos A. Hardy , David F. Welch , Robert G. Waarts , Donald R. Scifres
发明人： David G. Mehuys , Amos A. Hardy , David F. Welch , Robert G. Waarts , Donald R. Scifres
IPC分类号： H01S5/40
CPC分类号： H01S5/4031
摘要： In a semiconductor laser array structure in which antiguided regions between high effective refractive index waveguide regions experience greater gain then the waveguide regions, structures introduced at the sides of the array, next to the edgemost waveguides and not on the array period, reflect laterally transmitted radiation back toward the center of the array. The edge reflecting structures may be waveguide regions having widths of (m'+1/2) half-wavelengths, where "m'" is zero or a positive integer, compared to array waveguides with width m, where "m" is an integer not necessarily equal to "m'". The edge reflecting structures may also be stacks of such waveguides, where the regions between the edge waveguides are of a width substantially equal to (n'+1/2) half-wavelengths, compared to antiguide element widths of n half-wavelengths. The two integers n and n' may be, but are not necessarily, equal. Alternatively, the edge reflectors can be mirrors fabricated at the side edges of the array or by disordering the active region beyond the edgemost waveguides to form a refractive index step. The mirrors should be positioned a distance substantially a/2 from the edgemost emitters, where "a" is the array period.
摘要翻译：在半导体激光器阵列结构中，其中高有效折射率波导区域之间的防护区域具有更大的增益，然后波导区域，引导在阵列侧面的结构，在边缘波导旁边，而不是阵列周期，反射横向透射辐射回到阵列的中心。与具有宽度m的阵列波导相比，边缘反射结构可以是宽度为（m'+ 1/2）半波长的波导区域，其中“m”为零或正整数，其中“m”为整数不一定等于“m”。边缘反射结构也可以是这样的波导的堆叠，其中边缘波导之间的区域的宽度基本上等于（n'+ 1/2）个半波长，与n个半波长的防卫元件宽度相比。两个整数n和n'可以是但并不一定相等。或者，边缘反射器可以是在阵列的侧边缘处制造的反射镜，或者通过使有源区域超出边缘波导的方式来形成折射率步骤。镜子应该与edgemost发射器的距离基本上为1/2，其中“a”是阵列周期。

14. 发明授权

US6021141A Tunable blue laser diode 失效
标题翻译：可调蓝色激光二极管
公开(公告)号：US6021141A
公开(公告)日：2000-02-01
申请号：US808737
申请日：1997-02-28
申请人： Derek W. Nam , David F. Welch , Robert G. Waarts , Jo S. Major
发明人： Derek W. Nam , David F. Welch , Robert G. Waarts , Jo S. Major
IPC分类号： H01S5/02 , H01S3/10
CPC分类号： H01S5/02
摘要： A harmonic generator laser system which features a distributed Bragg reflector (DBR) or distributed feedback (DFB) tunable diode laser coupled to a quasi-phase matched (QPM) waveguide of optically nonlinear material. Tuning of the DBR laser may be achieved either thermally or via current injection, or both, halving the wavelength of a red laser into the visible blue spectral band. Thermal tuning may provide a coarse tuning adjustment, while injected current may provide fine tuning accessible to a user. Separately or in combination with current tuning, a modulation signal may be applied to the DBR laser for achieving an intensity modulated or a pulsed output. In another embodiment, modulation may be achieved by frequency modulation of the laser. A very compact tunable blue laser is formed. In yet another embodiment a double clad fiber amplifier is disposed between the tunable laser and the waveguide. The fiber amplifier is pumped by a high power laser, while the core guides light to be frequency doubled in the nonlinear material from a continuously tunable laser.
摘要翻译：一种谐波发生器激光系统，其特征在于耦合到光学非线性材料的准相位匹配（QPM）波导的分布式布拉格反射器（DBR）或分布式反馈（DFB）可调谐二极管激光器。 DBR激光器的调谐可以通过热或通过电流注入或二者实现，将红色激光器的波长减半成可见蓝色光谱带。热调谐可以提供粗调谐调节，而注入的电流可以提供用户可访问的微调。单独地或结合当前调谐，调制信号可以被施加到DBR激光器以实现强度调制或脉冲输出。在另一个实施例中，可以通过激光器的频率调制实现调制。形成非常紧凑的可调谐蓝色激光。在又一实施例中，双包层光纤放大器设置在可调激光器和波导之间。光纤放大器由大功率激光器泵浦，核心引导来自连续可调激光器的非线性材料中的频率倍增的光。

15. 发明授权

US5644584A Tunable blue laser diode 失效
标题翻译：可调蓝色激光二极管
公开(公告)号：US5644584A
公开(公告)日：1997-07-01
申请号：US625781
申请日：1996-03-29
申请人： Derek W. Nam , David F. Welch , Robert G. Waarts , Jo S. Major
发明人： Derek W. Nam , David F. Welch , Robert G. Waarts , Jo S. Major
IPC分类号： G02F1/37 , G02F1/35 , G02F1/377 , H01S3/067 , H01S5/00 , H01S5/022 , H01S5/024 , H01S5/06 , H01S5/0687 , H01S5/12 , H01S5/125 , H01S3/10
CPC分类号： H01S5/02415 , H01S5/02248 , H01S5/0687 , G02F1/377 , G02F2001/3548 , H01S3/0092 , H01S3/06754 , H01S3/09415 , H01S3/2375 , H01S5/0092 , H01S5/02446 , H01S5/0612 , H01S5/06256 , H01S5/4087
摘要： A harmonic generator laser system which features a distributed Bragg reflector (DBR) or distributed feedback (DFB) tunable diode laser coupled to a quasi-phasematched (QPM) waveguide of optically nonlinear material. Tuning of the DBR laser may be achieved either thermally or via current injection, or both, halving the wavelength of a red laser into the visible blue spectral band. Thermal tuning may provide a coarse tuning adjustment, while injected current may provide fine tuning accessible to a user. Separately or in combination with current tuning, a modulation signal may be applied to the DBR laser for achieving an intensity modulated or a pulsed output. In another embodiment, modulation may be achieved by frequency modulation of the laser. A very compact tunable blue laser is formed. In yet another embodiment a double clad fiber amplifier is disposed between the tunable laser and the waveguide. The fiber amplifier is pumped by a high power laser, while the core guides light to be frequency doubled in the nonlinear material from a continuously tunable laser.
摘要翻译：一种谐波发生器激光系统，其特征在于耦合到光学非线性材料的准相位（QPM）波导的分布式布拉格反射器（DBR）或分布式反馈（DFB）可调谐二极管激光器。 DBR激光器的调谐可以通过热或通过电流注入或二者实现，将红色激光器的波长减半成可见蓝色光谱带。热调谐可以提供粗调谐调节，而注入的电流可以提供用户可访问的微调。单独地或结合当前调谐，调制信号可以被施加到DBR激光器以实现强度调制或脉冲输出。在另一个实施例中，可以通过激光器的频率调制实现调制。形成非常紧凑的可调谐蓝色激光。在又一实施例中，双包层光纤放大器设置在可调激光器和波导之间。光纤放大器由大功率激光器泵浦，核心引导来自连续可调激光器的非线性材料中的频率倍增的光。

16. 发明授权

US5337328A Semiconductor laser with broad-area intra-cavity angled grating 失效
标题翻译：具有广域腔内角度光栅的半导体激光器
公开(公告)号：US5337328A
公开(公告)日：1994-08-09
申请号：US97682
申请日：1993-07-27
申请人： Robert J. Lang , Kenneth M. Dzurko , Donald R. Scifres , David F. Welch
发明人： Robert J. Lang , Kenneth M. Dzurko , Donald R. Scifres , David F. Welch
IPC分类号： H01S5/026 , H01S5/028 , H01S5/10 , H01S5/125 , H01S5/187 , H01S5/20 , H01S5/40 , H01S5/42 , H01S5/50 , H01S3/19
CPC分类号： H01S5/1032 , H01S5/1071 , H01S5/20 , H01S5/423 , H01S5/026 , H01S5/028 , H01S5/1243 , H01S5/125 , H01S5/187 , H01S5/2036 , H01S5/4075 , H01S5/42 , H01S5/50
摘要： A semiconductor laser includes a grating that is disposed at an angle to cavity reflectors to coherently diffract a beam of light along a path that is at least partially laterally directed within the cavity. The grating period and orientation are selected such that a specified wavelength of the light beam propagating along the path will resonate for light that impinges upon the end reflectors at normal incidence. By keeping the angle of incidence of the light beam upon the grating greater than about 45 degrees, reflectivity of the grating is maximized and the required grating period is larger thereby simplifying the fabrication of the grating.
摘要翻译：半导体激光器包括光栅，该光栅与空腔反射器成角度设置，以沿着至少部分横向定向在空腔内的路径相干地衍射光束。选择光栅周期和取向，使得沿着路径传播的光束的指定波长将对于在正常入射时撞击端反射器的光共振。通过将光束的入射角保持在大于45度的光栅上，光栅的反射率最大化，并且所需的光栅周期更大，从而简化了光栅的制造。

17. 发明授权

US5537432A Wavelength-stabilized, high power semiconductor laser 失效
标题翻译：波长稳定的大功率半导体激光器
公开(公告)号：US5537432A
公开(公告)日：1996-07-16
申请号：US390121
申请日：1995-02-17
申请人： David G. Mehuys , David F. Welch , Robert J. Lang , Donald R. Scifres
发明人： David G. Mehuys , David F. Welch , Robert J. Lang , Donald R. Scifres
IPC分类号： H01S3/081 , H01S3/23 , H01S5/026 , H01S5/0625 , H01S5/10 , H01S5/12 , H01S5/125 , H01S5/14 , H01S5/18 , H01S5/187 , H01S5/20 , H01S5/40 , H01S5/50 , H01S3/19
CPC分类号： H01S5/1014 , G02B6/12004 , G02B6/305 , H01S5/026 , H01S5/10 , H01S5/141 , H01S5/20 , H01S3/0818 , H01S3/113 , H01S5/0286 , H01S5/0625 , H01S5/06256 , H01S5/0655 , H01S5/1003 , H01S5/1064 , H01S5/1082 , H01S5/1085 , H01S5/1215 , H01S5/125 , H01S5/14 , H01S5/146 , H01S5/18 , H01S5/187 , H01S5/2036 , H01S5/2063 , H01S5/4025 , H01S5/4062 , H01S5/4087 , H01S5/50
摘要： A wavelength-stabilized, semiconductor laser having a light amplifying diode heterostructure with a flared gain region in an external resonant cavity. The flared gain region has a narrow aperture end which may be coupled to a single mode waveguide and a wide output end. A light emitting surface of the heterostructure proximate to the wide end of the flared gain region is partially reflective and combines with an external reflector to form a resonant cavity that is effectively unstable. The intracavity light-emitting surface proximate to the narrow aperture end is antireflection coated. The external reflector may be a planar mirror or a grating reflector. A lens or an optical fiber may couple the aperture end of the flared gain region to the external reflector. Frequency-selective feedback is provided by orienting the grating reflector or providing a prism in the cavity in front of the external planar mirror. Other filtering elements may also be placed in the external cavity. The flared gain region and waveguide may be differentially pumped or modulated with current provided by separate contacts.
摘要翻译：一种波长稳定的半导体激光器，其具有在外部谐振腔中具有扩张增益区域的光放大二极管异质结构。扩口增益区域具有窄孔径端，其可以耦合到单模波导和宽输出端。接近扩张增益区域的宽端的异质结构的发光表面是部分反射的，并且与外部反射器组合以形成有效不稳定的谐振腔。靠近窄孔径的腔内发光表面是抗反射涂层的。外部反射器可以是平面镜或光栅反射器。透镜或光纤可将扩张增益区域的孔径端耦合到外部反射器。通过定向光栅反射器或在外部平面镜的前面的空腔中提供棱镜来提供频率选择反馈。其它过滤元件也可以放置在外部空腔中。扩张增益区域和波导可以通过由单独的触点提供的电流进行差分泵浦或调制。

18. 发明授权

US5715268A Laser amplifiers with suppressed self oscillation 失效
标题翻译：激光放大器抑制自振荡
公开(公告)号：US5715268A
公开(公告)日：1998-02-03
申请号：US724374
申请日：1996-10-01
申请人： Robert J. Lang , David F. Welch , Ross A. Parke , Donald R. Scifres
发明人： Robert J. Lang , David F. Welch , Ross A. Parke , Donald R. Scifres
IPC分类号： H01S5/026 , H01S5/06 , H01S5/0625 , H01S5/10 , H01S5/20 , H01S5/50 , H01S3/18
CPC分类号： H01S5/50 , H01S5/026 , H01S5/0608 , H01S5/06256 , H01S5/1064 , H01S5/20
摘要： A travelling-wave semiconductor laser amplifier having suppressed self-oscillation is provided. When incorporated into a master oscillator power amplifier device, such a device has improved light output versus amplifier current characteristics. Also provided is a method for suppressing self-oscillation in travelling-wave semiconductor laser amplifier structures for improving the characteristics of the device into which the amplifier is incorporated.
摘要翻译：提供抑制自振荡的行波半导体激光放大器。当结合到主振荡器功率放大器装置中时，这种装置对于放大器电流特性具有改进的光输出。还提供了一种用于抑制行波半导体激光放大器结构中的自振荡的方法，用于改善放大器并入其中的器件的特性。

19. 发明授权

US5440576A Branched MOPA device with phased array of amplifiers 失效
标题翻译：具有相控阵放大器的分支MOPA器件
公开(公告)号：US5440576A
公开(公告)日：1995-08-08
申请号：US229383
申请日：1994-04-18
申请人： David F. Welch , Robert J. Lang , Julian S. Osinski , Kenneth M. Dzurko , David G. Mehuys , Robert G. Waarts
发明人： David F. Welch , Robert J. Lang , Julian S. Osinski , Kenneth M. Dzurko , David G. Mehuys , Robert G. Waarts
IPC分类号： H01S5/026 , H01S5/10 , H01S5/40 , H01S5/50 , H01S3/10
CPC分类号： H01S5/4031 , H01S5/026 , H01S5/1064 , H01S5/50
摘要： A phased array of flared amplifiers fed by phase adjusters and a power splitter produces a single high power beam when the flared amplifier sections are aligned and closely spaced. In one embodiment the array is excited by a DBR laser integrated into the same substrate as the flared amplifiers. In another embodiment the array is self-excited and forms a laser between an edge of the substrate common to the power splitter and an edge of the substrate common to the flared amplifier.
摘要翻译：当相位调节器和功率分配器馈送的相控放大器的相控阵列当扩张放大器部分对准并且紧密间隔时产生单个高功率光束。在一个实施例中，阵列由与发射放大器集成在同一衬底中的DBR激光器激发。在另一个实施例中，阵列是自激的，并且在功率分配器公共的衬底的边缘与扩张放大器公共的衬底的边缘之间形成激光。

20. 发明授权

US5651018A Wavelength-stabilized, high power semiconductor laser 失效
标题翻译：波长稳定的大功率半导体激光器
公开(公告)号：US5651018A
公开(公告)日：1997-07-22
申请号：US654066
申请日：1996-05-28
申请人： David G. Mehuys , David F. Welch , Robert J. Lang , Donald R. Scifres
发明人： David G. Mehuys , David F. Welch , Robert J. Lang , Donald R. Scifres
IPC分类号： H01S3/081 , H01S3/23 , H01S5/026 , H01S5/0625 , H01S5/10 , H01S5/12 , H01S5/125 , H01S5/14 , H01S5/18 , H01S5/187 , H01S5/20 , H01S5/40 , H01S5/50 , H01S3/19 , H01S3/08 , H01S3/13
CPC分类号： H01S5/1014 , G02B6/12004 , G02B6/305 , H01S5/026 , H01S5/10 , H01S5/141 , H01S5/20 , H01S3/0818 , H01S3/113 , H01S5/0286 , H01S5/0625 , H01S5/06256 , H01S5/0655 , H01S5/1003 , H01S5/1064 , H01S5/1082 , H01S5/1085 , H01S5/1215 , H01S5/125 , H01S5/14 , H01S5/146 , H01S5/18 , H01S5/187 , H01S5/2036 , H01S5/2063 , H01S5/4025 , H01S5/4062 , H01S5/4087 , H01S5/50
摘要： A wavelength-stabilized, semiconductor laser having a light amplifying diode heterostructure with a flared gain region in an external resonant cavity. The flared gain region has a narrow aperture end which may be coupled to a single mode waveguide and a wide output end. A light emitting surface of the heterostructure proximate to the Wide end of the flared gain region is partially reflective and combines with an external reflector to form a resonant cavity that is effectively unstable. The intracavity light-emitting surface proximate to the narrow aperture end is antireflection coated. The external reflector may be a planar mirror or a grating reflector. A lens or an optical fiber may couple the aperture end of the flared gain region to the external reflector. Frequency-selective feedback is provided by orienting the grating reflector or providing a prism in the cavity in front of the external planar mirror. Other filtering elements may also be placed in the external cavity. The flared gain region and waveguide may be differentially pumped or modulated with current provided by separate contacts.
摘要翻译：一种波长稳定的半导体激光器，其具有在外部谐振腔中具有扩张增益区域的光放大二极管异质结构。扩口增益区域具有窄孔径端，其可以耦合到单模波导和宽输出端。接近扩张增益区域的宽端的异质结构的发光表面是部分反射的，并且与外部反射器组合以形成有效地不稳定的谐振腔。靠近窄孔径的腔内发光表面是抗反射涂层的。外部反射器可以是平面镜或光栅反射器。透镜或光纤可将扩张增益区域的孔径端耦合到外部反射器。通过定向光栅反射器或在外部平面镜的前面的空腔中提供棱镜来提供频率选择反馈。其它过滤元件也可以放置在外部空腔中。扩张增益区域和波导可以通过由单独的触点提供的电流进行差分泵浦或调制。

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