公开(公告)号：US6122299A

公开(公告)日：2000-09-19

申请号：US1769

申请日：1997-12-31

申请人： Scott D. DeMars ,  Robert J. Lang ,  Alexander Schoenfelder

发明人： Scott D. DeMars ,  Robert J. Lang ,  Alexander Schoenfelder

IPC分类号： G02B6/12 ,  G02B6/122 ,  G02B6/124 ,  H01S5/026 ,  H01S5/12 ,  H01S3/085 ,  G02B6/26

CPC分类号： G02B6/122 ,  G02B6/124 ,  H01S5/12 ,  G02B2006/12104 ,  G02B2006/12107 ,  G02B2006/12121 ,  H01S5/026 ,  H01S5/1203

摘要： A optical medium, such as an angled distributed reflector, e.g., an angular grating, or .alpha.-DFB laser diode or a waveguide wavelength selective filter, has a mean optical axis defining an optical cavity for substantially confined light propagation within the device. An angular grating is provided in at least a portion of the optical cavity forming a grating region permitting light to propagate along the optical cavity in two coupled waves or modes incident along the angular grating, a first incident propagating wave substantially parallel with respect to the mean optical axis and a second incident propagating wave at an angle with respect to the mean optical axis. At least one preferential coupling region in the optical cavity at an interface or boundary with the grating region to receive both propagating waves and provide for preferential treatment to the first incident propagating wave by coupling propagating light in the second incident propagating wave into the first incident propagating wave prior to light output from the medium via the non-grating region, forming a boundary with the grating region. The angle of the boundary at the interface of these respective regions is chosen to be substantially collinear with a propagation direction of the second incident propagating wave so that propagating light in the second incident propagating wave will substantially enter the preferential coupling region from the grating region via the boundary in a propagation direction substantially parallel with the mean optical axis.

摘要翻译： 光学介质，例如角度分布式反射器，例如角度光栅或α-DFB激光二极管或波导波长选择滤光器，具有限定用于在该器件内基本上限定的光传播的光腔的平均光轴。 在光腔的至少一部分中形成角度光栅，形成光栅区域，允许光以沿着角光栅入射的两个耦合波或模式沿光腔传播，第一入射传播波相对于平均值基本平行 光轴和相对于平均光轴成一定角度的第二入射传播波。 在光腔中的与光栅区域的界面或边界处的至少一个优先耦合区域，以接收两个传播波，并且通过将第二入射传播波中的传播光耦合到第一入射传播波中来提供对第一入射传播波的优先处理 在经由非光栅区域从介质输出光之前，形成与光栅区域的边界。 选择这些各个区域的界面处的边界的角度与第二入射传播波的传播方向基本共线，使得第二入射传播波中的传播光将基本上从光栅区域经由 在传播方向上与平均光轴平行的边界。

公开(公告)号：US06240116B1

公开(公告)日：2001-05-29

申请号：US09037585

申请日：1998-03-10

申请人： Robert J. Lang ,  Alexander Schoenfelder ,  Michael P. Staskus ,  John G. Endriz ,  James M. Haden

发明人： Robert J. Lang ,  Alexander Schoenfelder ,  Michael P. Staskus ,  John G. Endriz ,  James M. Haden

IPC分类号： H01S500

CPC分类号： G02B19/0057 ,  G02B19/0028 ,  G02B27/0905 ,  G02B27/0977 ,  G02B27/126 ,  G02B27/143 ,  H01S5/005 ,  H01S5/0071 ,  H01S5/02252 ,  H01S5/02423 ,  H01S5/4012 ,  H01S5/4031 ,  H01S5/4075

摘要： The invention relates to laser diode arrays having high beam quality and high beam brightness. In one approach, a laser diode array package includes a mount and first and second laser diode arrays disposed on the mount. Each of the laser diode arrays defines an optical axis and has an emitting surface lying in an emitting surface plane. The emitting surface plane of the first laser diode array is displaced relative to the emitting surface plane of the second laser diode array in a direction parallel to one of the optical axes. The optical axes of the first and second laser diode arrays are offset from each other in a direction perpendicular to one of the optical axes. First and second lenses are disposed relative to respective emitting surfaces to reduce divergence of light output from the emitting surfaces. In another approach, laser diode array bars are stacked and the individual output beam from each bar is collimated using a short focal length, low aberration lens. The resulting collimated beams are treated with reflectors to reduce, or remove, the dead spaces between adjacent collimated beams, thus permitting the use of low aberration lenses, which results in an improved divergence-size product for each beam produced by a bar. Additionally, the total beam output by the array of laser bars is condensed in size.

摘要翻译： 本发明涉及具有高光束质量和高光束亮度的激光二极管阵列。 在一种方法中，激光二极管阵列封装包括安装件和设置在安装座上的第一和第二激光二极管阵列。 每个激光二极管阵列限定光轴并且具有位于发射表面平面中的发射表面。 第一激光二极管阵列的发射表面平面相对于第二激光二极管阵列的发射表面平行于一个光轴移位。 第一和第二激光二极管阵列的光轴在垂直于一个光轴的方向上彼此偏移。 第一和第二透镜相对于各个发射表面设置，以减少从发射表面输出的光的发散。 在另一种方法中，激光二极管阵列条被堆叠，并且来自每个条的单个输出光束使用短焦距低像差透镜进行准直。 所产生的准直光束被反射器处理以减少或去除相邻准直光束之间的死空间，从而允许使用低像差透镜，这导致由条产生的每个光束的改进的发散尺寸乘积。 此外，由激光棒阵列输出的总光束的尺寸被缩小。

公开(公告)号：US5793521A

公开(公告)日：1998-08-11

申请号：US684786

申请日：1996-07-22

申请人： Stephen O'Brien ,  Alexander Schoenfelder ,  Robert J. Lang ,  Amos A. Hardy ,  Ross A. Parke ,  David F. Welch

发明人： Stephen O'Brien ,  Alexander Schoenfelder ,  Robert J. Lang ,  Amos A. Hardy ,  Ross A. Parke ,  David F. Welch

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： H01S5/026 ,  H01S5/0425 ,  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 gain medium comprising, for example, an optical semiconductor device which is differentially pumped and a master oscillator power amplifier (MOPA) device employing such an amplifier. The gain medium may have a linear stripe region or a diverging stripe region that allows the light propagating therein to diverge along at least part of its length, such as a flared or tapered 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 employing differential pumping. Differential pumping may be both longitudinal and lateral within the amplifier and may be patterned to reduce the peak modal gain observed longitudinally along and/or laterally across the pumped stripe region of the gain medium so that he experienced modal gain of the propagating light is more balanced along the length of the stripe region, i.e., rendered significantly more uniform in distribution, providing for higher diffraction limited performance without optical filamentation formation.

摘要翻译： 一种光增益介质，包括例如差分泵浦的光半导体器件和使用这种放大器的主振荡器功率放大器（MOPA）器件。 增益介质可以具有线性条纹区域或发散条纹区域，其允许其中传播的光沿着其长度的至少一部分发散，例如具有增大区域的扩张区域或锥形放大器，该增宽区域在宽度方向上朝向其输出端 等于或超过光的分歧。 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，以便通过差分泵浦将光束的相干保持为高功率电平。 差分泵浦可以在放大器内纵向和横向两者，并且可以被图案化以减少在增益介质的泵浦条带区域沿纵向和/或横向观察到的峰值模态增益，使得他经历了传播光的模态增益更均衡 沿着条纹区域的长度，即在分布中显着地更均匀地提供，从而提供更高的衍射限制性能，而不需要光学成丝形成。