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31.发明公开
公开(公告)号：EP0383638A3
公开(公告)日：1991-10-02
申请号：EP90301759.8
申请日：1990-02-19
CPC分类号： H01S3/2308 , H01S3/08063 , H01S3/08072 , H01S3/10092 , H01S3/115
摘要： A laser oscillator/amplifier system in which thermally induced birefringence in the gain medium of the oscillator is compensated by thermally induced birefringence in the gain medium of the amplifier. The system produces a quality output beam efficiently and with high power density in the preferred polarization. The oscillator cavity (10) has a high reflector (12) at one end and an output coupler (13) at the second end with an oscillator gain medium (14) exhibiting thermally induced birefringence in between. An amplifier (11) exhibiting thermally induced birefringence which matches the thermally induced birefringence in the oscillator gain medium is mounted to receive the output of the oscillator cavity. A ninety degree rotator (21) is mounted between the oscillator gain medium (14) and the amplifier (11) so that thermally induced birefringence in the oscillator gain medium is compensated by the matching thermally induced birefringence in the amplifier. The ninety degree rotator may be mounted inside the oscillator cavity, that is, between the oscillator gain medium and the output coupler; or it may be mounted outside of the oscillator cavity, that is, between the output coupler and the amplifier, as shown.
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公开(公告)号：EP1459415A2
公开(公告)日：2004-09-22
申请号：EP02795632.5
申请日：2002-11-13
IPC分类号： H01S3/06
CPC分类号： H01S3/0632 , H01S3/025 , H01S3/0407 , H01S3/042 , H01S3/08063 , H01S3/08081 , H01S3/094084 , H01S3/0941 , H01S3/11
摘要： An edge-pumped solid state thin slab laser apparatus is disclosed that is power scalable to well over 150 W for either multimode or near single transverse mode operation. A slab thickness is selected that is small enough to minimize thermal effects for a straight through beam yet large enough to allow efficient direct coupling of pump light from high power diode array stacks while also keeping the gain to within manageable levels for pulsed operation. Cooling of the slab is provided by contact with metal blocks. The edge-pumped solid state thin slab laser provides a near-one dimensional temperature gradient and heat flow direction that is perpendicular to the laser signal plane of propagation. The width of the slab is selected so as to maximize pump absorption length for a given laser material and both one and two-sided pumping schemes can be accommodated by the basic slab laser platform.
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公开(公告)号：EP0742964B1
公开(公告)日：2003-09-03
申请号：EP95908756.0
申请日：1995-01-31
IPC分类号： H01S3/0941 , H01S3/08
CPC分类号： H01S3/09415 , H01S3/08 , H01S3/08072 , H01S3/081 , H01S3/094053 , H01S3/1611 , H01S3/1673
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34.发明公开Diode pumped laser using gain mediums with strong thermal focussing 审中-公开Diodengepumpter激光器Verwendung vonVerstärkungsmediamit starker thermaler Fokussierung
公开(公告)号：EP1326312A2
公开(公告)日：2003-07-09
申请号：EP03075641.5
申请日：1998-10-22
IPC分类号： H01S3/0941 , H01S3/08
CPC分类号： H01S3/09415 , H01S3/042 , H01S3/08045 , H01S3/0805 , H01S3/08072 , H01S3/1611 , H01S3/1673
摘要： A diode pumped laser includes a resonator mirror and an output coupler, defining a laser resonator with a resonator optical axis. A strong thermal lens gain medium with a TEM 00 mode diameter is mounted in the resonator along the resonator optical axis. The dopant level of the gain medium is in the range of 0.01 to less than 0.5 percent. A diode pump source supplies a pump beam to the gain medium in the laser resonator, and produces an output beam with a diameter larger than the TEM 00 mode diameter to reduce thermal birefringence. A power source supplies power to the diode pump source. A polarizing element can be positioned in the resonator, along with an aperture stop. The laser operates well over a large range of pump powers. Its slope efficiency in the TEM 00 mode is greater than 40 %, with an overall efficiency greater than 25 %. One of the gain mediums used is Nd:YVO 4 . This material exhibits high gain and a short upper state lifetime. These properties make it attractive in designing a Q―switched laser, or one that is insensitive to optical feedback. Another material is Nd:NAG. The technique of optimizing the pump beam spot size is found to minimize loss due to thermal birefringence.
摘要翻译： 二极管泵浦激光器包括谐振器反射镜（12）和输出耦合器（14），其限定具有谐振器光轴（16）的激光谐振器（10）。 沿谐振器光轴将谐振器中安装了具有TEM00模式直径的强热透镜增益介质（24）。 增益介质的掺杂剂水平在0.01至小于0.5％的范围内。 二极管泵浦源（18）将泵浦光束提供给激光谐振器中的增益介质，并产生直径大于TEM00模式直径的输出光束，以减少热双折射。 电源为二极管泵浦源供电。 偏振元件可以与孔径光阑一起定位在谐振器中。 激光器在大范围的泵浦功率下运行良好。 其TEM00模式的斜率效率大于40％，总效率大于25％。 使用的增益介质之一是Nd：YVO4。 该材料具有较高的增益和较短的上限寿命。 这些性质使其在设计Q开关激光器或对光学反馈不敏感的激光器方面具有吸引力。 另一种材料是Nd：NAG。 发现优化泵浦光斑尺寸的技术可以使由于热双折射引起的损耗最小化。
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35.发明公开
公开(公告)号：EP1025624A2
公开(公告)日：2000-08-09
申请号：EP98956141.0
申请日：1998-10-22
IPC分类号： H01S1/00
CPC分类号： H01S3/09415 , H01S3/042 , H01S3/08045 , H01S3/0805 , H01S3/08072 , H01S3/1611 , H01S3/1673
摘要： A diode pumped laser includes a resonator mirror and an output coupler, defining a laser resonator with a resonator optical axis. A strong thermal lens gain medium with a TEM00 mode diameter is mounted in the resonator along the resonator optical axis. The dopant level of the gain medium is in the range of 0.01 to less than 0.5 percent. A diode pump source supplies a pump beam to the gain medium in the laser resonator, and produces an output beam with a diameter larger than the TEM00 mode diameter to reduce thermal birefringence. A power source supplies power to the diode pump source. A polarizing element can be positioned in the resonator, along with an aperture stop. The laser operates well over a large range of pump powers. Its slope efficiency in the TEM00 mode is greater than 40 %, with an overall efficiency greater than 25 %. One of the gain mediums used is Nd:YVO4. This material exhibits high gain and a short upper state lifetime. These properties make it attractive in designing a Q-switched laser, or one that is insensitive to optical feedback. Another material is Nd:YAG. The technique of optimizing the pump beam spot size is found to minimize loss due to thermal birefringence.
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公开(公告)号：EP0854380A2
公开(公告)日：1998-07-22
申请号：EP98300112.4
申请日：1998-01-08
发明人： Pieterse, Jan-Willem , Petersen, Alan B. , Pohalski, Chris , Cheng, Emily , Lane, Randall , Nighan, William L., Jr.
CPC分类号： H01S3/10 , G02F1/353 , G02F1/3534 , G02F1/37 , G02F2001/354 , G02F2201/16
摘要： A diode pumped laser includes a high reflector and an output coupler defining a resonator. The resonator includes a gain medium and a Q-switch and produces a fundamental beam. A first non-linear crystal is positioned extra-cavity of the resonator along a path of the fundamental beam. The first non-linear crystal generates a second harmonic beam from the fundamental beam. The first non-linear crystal is critically phased matched. A second non-linear is portioned extra-cavity of the resonator along a path of the fundamental beam and the path of the second harmonic beam. The second non-linear crystal produces a third harmonic beam. The second non-linear crystal is critically phased matched.
摘要翻译： 二极管泵浦激光器（48）包括高反射器和限定谐振器的输出耦合器。 谐振器包括增益介质和Q开关，并产生基波束（50）。 第一非线性晶体（倍频器，10）并且沿着基波束的路径被定位在谐振器的外腔。 第一个非线性晶体从基波束产生二次谐波。 第一个非线性晶体被严格分阶段匹配。 第二非线性（三倍子，12'）沿着基波束的路径和二次谐波波束的路径分布在谐振器的外腔。 第二非线性晶体产生三次谐波束（86）。 第二个非线性晶体被严格分阶段匹配。
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公开(公告)号：EP0823143A1
公开(公告)日：1998-02-11
申请号：EP96913125.0
申请日：1996-04-24
IPC分类号： H01S3
CPC分类号： H01S3/09415 , H01S3/08072 , H01S3/094053 , H01S3/1611 , H01S3/1673 , H01S2301/206
摘要： A diode pumped laser includes a resonator mirror and an output coupler, defining a laser resonator with a resonator optical axis. A strong thermal lens laser crystal with a TEM00 mode diameter is mounted in the resonator along the resonator optical axis. A diode pump source supplies a pump beam to the laser crystal in the laser resonator, and produces an output beam with a diameter larger that the TEM00 mode diameter to reduce thermal birefringence. A power source supplies power to the diode pump source. A polarizing element can be positioned in the resonator, along with an aperture stop. The laser operates well over a large range of pump powers. Its slope efficiency in the TEM00 mode is greater than 40 %, with an overall efficiency greater than 25 %. One of the lasing crystals used is Nd:YVO4. This material exhibits high gain and a short upper state lifetime. These properties make it attractive in designing a Q-switched laser, or one that is insensitive to optical feedback. Another material is Nd:YAG. The technique of optimizing the pump beam spot size is found to minimize loss due to thermal birefringence.
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38.发明公开APPARATUS FOR COUPLING A MULTIPLE EMITTER LASER DIODE TO A MULTIMODE OPTICAL FIBER 失效设备用于链接VIELFACHEMITTIERENDER激光二极管的光多模光纤
公开(公告)号：EP0774129A1
公开(公告)日：1997-05-21
申请号：EP96921231.0
申请日：1996-05-28
发明人： HEAD, David, F. , BAER, Thomas, M.
CPC分类号： G02B6/4206 , G02B6/425 , H01S3/094053 , H01S3/0941 , H01S5/4025
摘要： A laser system includes a laser diode source (10) with a plurality of output facets (12, 14, 16). The laser diode source (10) produces a divergent output along an emission path. A microlens (26) is optically coupled to the diode source (10). The microlens (26)receives the divergent output along the emission path and modifies the divergence of the output in a high numerical direction of the microlens (26). A power source is coupled to the laser diode source (10).
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公开(公告)号：EP0771482A1
公开(公告)日：1997-05-07
申请号：EP96916488.0
申请日：1996-05-17
IPC分类号： H01S3
CPC分类号： H01S3/109 , H01S3/081 , H01S3/094053 , H01S3/09415 , H01S3/13 , H01S3/1611 , H01S3/1643 , H01S3/1653 , H01S3/1673
摘要： A diode pumped, multiaxial mode, intracavity frequency doubled laser resonator has high amplitude stability, meaning that the percent root mean square noise (% RMS) of the doubled output beam power is low. A diode pump source supplies a pump beam to a laser crystal (Nd:YVO4) positioned in a resonator cavity and produces a multiaxial mode infrared beam that is incident on a doubling crystal (KTP), also positioned in the resonator. A frequency doubled output beam is produced that has an RMS of less than 3 %, and in some cases less than 0.2 %. The laser is highly efficient, provides high output power, and its ouput beam is of high spatial quality.
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公开(公告)号：EP0742963A1
公开(公告)日：1996-11-20
申请号：EP95908755.0
申请日：1995-01-31
IPC分类号： H01S3
CPC分类号： H01S3/09415 , H01S3/08072 , H01S3/094053 , H01S3/1611 , H01S3/1673
摘要： A high power, highly efficient laser that produces a polarized, round diffraction limited gaussian beam is disclosed. A strong thermal lens laser crystal (24) with controlled ellipticity, is mounted in a laserhead (10) and pumped by a fiber-bundle-coupled (22) diode source (18). The pump beam diameter in the crystal is greater than the crystal's TEM00 mode diameter. The laser operates well over a large range of pump powers. Its slope efficiency in the TEM00 mode is greater than 40 %, with an overall efficiency greater than 25 %. One of the lasing crystals used is Nd:YVO4. This material exhibits high gain and a short upper state lifetime. These properties make it attractive in designing a Q-switched laser, or one that is insensitive to optical feedback.
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