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公开(公告)号：US4685107A
公开(公告)日：1987-08-04
申请号：US872295
申请日：1986-06-09
申请人： James D. Kafka , Thomas M. Baer , David F. Head
发明人： James D. Kafka , Thomas M. Baer , David F. Head
CPC分类号： H01S3/083 , H01S3/1086 , H01S3/302
摘要： A dispersion compensation delay line is added to a synchronously pumped fiber Raman ring oscillator to generate subpicosecond pulses. A pair of spaced gratings form the delay line. An interference filter is used as a bandwidth limiting tuning element to provide a good quality short pulse. An integrated design eliminates the discrete optical elements by using only an optical fiber and an optical fiber coupler.
摘要翻译： 将色散补偿延迟线添加到同步泵浦光纤拉曼环形振荡器以产生亚秒脉冲。 一对隔开的光栅形成延迟线。 干扰滤波器被用作带宽限制调谐元件，以提供良好质量的短脉冲。 集成设计通过仅使用光纤和光纤耦合器消除了分立的光学元件。
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公开(公告)号：US4942582A
公开(公告)日：1990-07-17
申请号：US341922
申请日：1989-04-24
申请人： Gregory J. Kintz , Thomas M. Baer , James D. Kafka
发明人： Gregory J. Kintz , Thomas M. Baer , James D. Kafka
IPC分类号： H01S3/0941 , H01S3/109 , H01S3/16
CPC分类号： H01S3/09415 , H01S3/0621 , H01S3/16 , H01S3/109 , H01S3/1611 , H01S3/1673
摘要： A solid state laser including a block of Nd:YVO.sub.2, Nd:YSAG, or Nd:YAB laser material having a cavity-defining mirror at one of its end surfaces is pumped by a laser diode pumping source having narrow bandwidth and is caused to lase in a single longitudinal mode by controlling the relationship between the pump power, the bandwidth of the lasing transition within the laser material, and the absorption depth of the pump radiation within the laser material.
摘要翻译： 包括Nd：YVO2，Nd：YSAG或Nd：YAB激光材料块在其端表面之一具有空腔限定镜的固体激光器由具有窄带宽的激光二极管泵浦源泵浦，并被引入 通过控制泵功率，激光材料内的激光转换的带宽与激光材料内的泵浦辐射的吸收深度之间的关系，以单一纵向模式。
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3.发明授权Continuum generation with miniaturized Q-switched diode pumped solid state laser 失效使用小型Q开关二极管泵浦固态激光器进行连续生成
公开(公告)号：US4847850A
公开(公告)日：1989-07-11
申请号：US62804
申请日：1987-06-15
申请人： James D. Kafka , Mark Linne , Thomas M. Baer
发明人： James D. Kafka , Mark Linne , Thomas M. Baer
IPC分类号： H01S3/0941 , H01S3/11 , H01S3/117
CPC分类号： H01S3/025 , H01S3/09415 , H01S3/117
摘要： A miniaturized Q-switch is added to the resonant cavity of a compact laser diode pumped solid state laser to produce short high peak power pulses which are input into a single mode optical fiber to form a compact continuum generator. Q-switching the compact laser diode pumped solid state lasers takes advantage of the relatively high gain and short cavity length to provide a desirable combination of pulsewidth and pulse energy. Nd:YAG or Nd:YLF are useful solid state laser materials for Q-switching, or other longer lifetime rare earth ions such as erbium or holmium for greater energy storage. The Q-switch is formed of a material such as TeO.sub.2, SF.sub.10, or LiNbO.sub.3 with an acoustooptic figure of merit substantially greater tha fused silica. The high peak powers of the lasers are sufficient to exceed the threshold for Raman conversion in the fiber which produces a series of red shifted bands ending in a continuum by stimulated Raman scattering.
摘要翻译： 将小型化Q开关添加到紧凑型激光二极管泵浦固态激光器的谐振腔中，以产生短的高峰值功率脉冲，其输入到单模光纤以形成紧凑的连续发生器。 Q切换紧凑型激光二极管泵浦固态激光器利用相对较高的增益和短腔长度来提供脉冲宽度和脉冲能量的期望组合。 Nd：YAG或Nd：YLF是用于Q开关或其他更长寿命的稀土离子（例如铒或钬）的有用的固态激光材料，用于更大的能量存储。 Q开关由诸如TeO 2，SF 10或LiNbO 3的材料形成，其声光特性值大大高于熔融二氧化硅。 激光器的高峰值功率足以超过光纤中拉曼转换的阈值，其产生通过受激拉曼散射在连续体中结束的一系列红移带。
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4.发明授权
公开(公告)号：US4913533A
公开(公告)日：1990-04-03
申请号：US136896
申请日：1987-12-22
CPC分类号： G02F1/37 , G02F1/3525
摘要： A KTP crystal in a nonlinear optical device is heated to and operated at a temperature of at least 50.degree. C. and less than 350.degree. C., and more preferably about 90.degree. C. to about 200.degree. C., and most preferably to about 100.degree. C. to about 125.degree. C., to reduce drift and damage. The KTP crystal is placed in an oven or other heating device, which may be regulated or unregulated. The KTP may be cut at the room temperature phase matching angle and angle tuned for operation at the higher temperature, or the KTP may be cut at the correct angle for phase matching at the operating temperature.
摘要翻译： 将非线性光学器件中的KTP晶体加热至至少50℃且小于350℃，更优选约90℃至约200℃的温度下操作，最优选至 约100℃至约125℃，以减少漂移和损坏。 将KTP晶体放置在烘箱或其他加热装置中，其可以调节或不调节。 可以在室温相位匹配角度和角度下切割KTP以在较高温度下操作，或者KTP可以在正确的角度切割以在工作温度下进行相位匹配。
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公开(公告)号：US4835778A
公开(公告)日：1989-05-30
申请号：US103244
申请日：1987-09-30
申请人： James D. Kafka , Thomas M. Baer
发明人： James D. Kafka , Thomas M. Baer
CPC分类号： H01S3/1112 , H01S3/067 , H01S3/06708 , H01S3/083 , H01S3/1068 , H01S3/1109
摘要： A fiber laser for producing subpicosecond pulses is formed by placing a laser fiber in a resonant cavity, in either a linear or closed loop configuration. The laser fiber is formed of two different types of fibers joined in series, a gain fiber which contains the laser gain medium followed by a pulse shaping fiber which uses the phenomenon of solution pulse shaping to shorten the pulses. An initially formed pulse recirculates many times in the resonator; on each pass the pulse is both amplified and shortened until steady state is reached. The zero dispersion wavelength of the pulse shaping fiber is chosen to be slightly less than the laser wavelength. The fiber is pumped by a continuous source, particularly CW laser diodes. The initial pulse can be formed by a self starting technique produced by selecting the proper length of the laser fiber, or else a mode locker/acousto-optic shutter can be placed in the cavity.
摘要翻译： 用于产生亚皮秒脉冲的光纤激光器通过将激光光纤放置在线圈或闭环配置的谐振腔中而形成。 激光光纤由串联连接的两种不同类型的光纤形成，增益光纤包含激光增益介质，随后是脉冲成形光纤，其使用溶液脉冲整形现象来缩短脉冲。 初始形成的脉冲在谐振器中多次循环; 在每次通过时，脉冲都被放大和缩短，直到达到稳定状态。 选择脉冲整形光纤的零色散波长略小于激光波长。 光纤由连续光源泵浦，特别是CW激光二极管。 初始脉冲可以通过选择激光光纤的适当长度产生的自启动技术形成，或者可以将模式锁定/声光快门放置在腔中。
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公开(公告)号：US5008887A
公开(公告)日：1991-04-16
申请号：US340448
申请日：1989-04-19
申请人： James D. Kafka , Thomas M. Baer
发明人： James D. Kafka , Thomas M. Baer
CPC分类号： H01S3/1109 , H01S3/06791 , H01S3/083 , H01S3/094038 , H01S3/107
摘要： A mode-locked fiber laser having a length greater than 10 meters is equipped with an intracavity shutter or "mode-locking" device. The intracavity shutter is a broad bandwidth modulator which allows fast shutter on and off speeds, allowing short on times as well as short on-off and off-on transition times. The fiber and the modulator may be integrated. The fiber is comprised of a material doped with an active species having a long lifetime upper state, wherein the upper state lifetime is longer than the round trip time of a pulse through the fiber. The laser may be configured as either a linear laser or a ring cavity laser. The present invention allows short pulse widths with high pulse energies.
摘要翻译： 长度大于10米的锁模光纤激光器配备有腔内快门或“锁模”装置。 腔内快门是宽带调制器，允许快速快门打开和关闭速度，允许短时间以及短暂的开关和过渡时间。 光纤和调制器可以被集成。 纤维由掺杂有长寿命上部状态的活性物质的材料构成，其中上部状态寿命比通过纤维的脉冲的往返时间长。 激光器可以被配置为线性激光器或环形腔激光器。 本发明允许具有高脉冲能量的短脉冲宽度。
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公开(公告)号：US4896326A
公开(公告)日：1990-01-23
申请号：US152171
申请日：1988-02-03
申请人： James D. Kafka , Thomas M. Baer
发明人： James D. Kafka , Thomas M. Baer
IPC分类号： H01S3/00
CPC分类号： H01S3/0057
摘要： Fluctuations in input intensity and pulsewidth affect the frequency doubled output pulse of a fiber grating optical pulse compressor in a compressed, continuous-wave, mode-locked Nd:YAG laser system. An optimized intensity servo system greatly reduces these fluctuations and results in as much as 50 dB noise reduction at low frequencies. Fluctuations in either input intensity or pulsewidth are corrected by changing the input intensity by means of the servo system.
摘要翻译： 在压缩，连续波，锁模Nd：YAG激光系统中，输入强度和脉冲宽度的波动影响光纤光栅光脉冲压缩机的倍频输出脉冲。 优化的强度伺服系统大大减少了这些波动，并导致低频下多达50 dB的噪声降低。 通过伺服系统改变输入强度来校正输入强度或脉冲宽度的波动。
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公开(公告)号：US4646308A
公开(公告)日：1987-02-24
申请号：US782765
申请日：1985-09-30
申请人： James D. Kafka , Thomas M. Baer
发明人： James D. Kafka , Thomas M. Baer
CPC分类号： H01S3/08036 , H01S3/0057 , H01S3/094026 , H01S3/0092 , H01S3/094076
摘要： The output of a continuous wave modelocked Nd:YAG laser is first pulse compressed and then frequency doubled from infrared to green, to provide a new pumping source for a synchronously pumped dye laser. The disclosed apparatus and methods can achieve tunable subpicosecond pulses at relatively high average power, over 300 milliwatts. The 1064 nanometer output of the pulse compressor is frequency doubled to 532 nanometers so as to provide 3.5 picosecond pump pulses at 82 MHz and average power exceeding one watt. When this is used to pump a Rhodamine 6G dye laser, tunable pulses as short as 190 femtoseconds output can be obtained from the dye laser, with average power over 300 milliwatts. With the addition of a cavity dumper, tunable subpicosecond pulses of 80 kilowatt peak power have been generated.
摘要翻译： 连续波锁模Nd：YAG激光器的输出首先被脉冲压缩，然后从红外到绿色倍频，为同步泵浦染料激光器提供新的泵浦源。 所公开的装置和方法可以在超过300毫瓦的较高平均功率下实现可调节的亚秒脉冲。 脉冲压缩机的1064纳米输出频率加倍到532纳米，从而提供了在82MHz下的3.5皮秒泵浦脉冲，平均功率超过1瓦特。 当用于泵送罗丹明6G染料激光器时，可以从染料激光器获得短达190飞秒输出的可调谐脉冲，平均功率超过300毫瓦。 通过添加一个空腔翻转器，已经产生了80千瓦峰值功率的可调节的亚秒脉冲。
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公开(公告)号：US5185750A
公开(公告)日：1993-02-09
申请号：US717367
申请日：1991-06-19
CPC分类号： H01S3/1109 , H01S3/0805 , H01S3/0811 , H01S3/1068 , H01S3/1112 , H01S3/136 , H01S3/139
摘要： A mode locked pulsed laser incorporates an intracavity element to compensate for the dispersion caused by other intracavity elements. This element reduces the tendency of the pulse to broaden in the cavity due to group velocity dispersion and results in very short pulses. In the laser of the present invention, mode locking is initiated by detecting the beat frequency between adjacent longitudinal modes using a high speed photodiode. This signal is amplified and then the frequency is divided by two. The signal is passed through an electronically adjustable phase shifter and then to a power amplifier. This signal is applied to the acousto-optic modelocker. If the cavity length drifts the beat frequency between the longitudinal modes changes. The rf signal applied to the modulator changes in exactly the right manner to track the drift in cavity length. Thus the modelocker is automatically synched to the round trip of the laser cavity.
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公开(公告)号：US4750809A
公开(公告)日：1988-06-14
申请号：US729376
申请日：1985-05-01
CPC分类号： H01S3/0057 , Y10S359/90
摘要： A pulse compressor compresses a relatively long width optical pulse (of the kind which may be transform limited) to a short width pulse. The compressor includes a color generator which broadens the bandwidth of the long pulse to include any additional colors required for compression to the short pulse. The compressor also includes a grating which has a groove spacing and which is aligned with the output of the color generator at a grazing incidence angle effective for producing a compact grating structure, reduced ellipticity of the beam output from the compressor and high efficiency of light transmission through the device.
摘要翻译： 脉冲压缩器将相对较长宽度的光脉冲（可以被变换限制的那种）压缩成短宽度脉冲。 该压缩机包括一个颜色发生器，其扩展长脉冲的带宽以包括压缩到短脉冲所需的任何附加颜色。 该压缩机还包括一个光栅，该光栅具有一个沟槽间隔，并且与彩色发生器的输出端对准，该放大率有效地用于产生紧凑的光栅结构，减小了从压缩机输出的光束的椭圆率以及高的光传输效率 通过设备。
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