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公开(公告)号：US11223179B1
公开(公告)日：2022-01-11
申请号：US16687333
申请日：2019-11-18
发明人： Krishna Murari , Yanchun Yin , Fangjie Zhou , Yi Wu , Zenghu Chang
摘要： A laser system may include a seed laser formed from a Ti:Sapphire laser providing pulsed light and an optical parametric amplifier to generate pulsed light within a Holmium emission spectrum as seed pulses in response to the pulsed light from the Ti:Sapphire laser. A laser system may further include an amplifier to generate amplified pulses of light in response to the seed pulses from the seed laser, where the amplified pulses include at least some of the seed pulses amplified by the one or more Holmium-doped gain media pumped by the one or more pump lasers. The amplifier may include one or more Holmium-doped gain media and one or more pump lasers providing continuous-wave pump light within an absorption spectrum of the one or more Holmium-doped gain media.
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公开(公告)号：US10790631B2
公开(公告)日：2020-09-29
申请号：US16032808
申请日：2018-07-11
发明人： Zenghu Chang , Xiaoming Ren , Yanchun Yin , Lam Mach
摘要： The present invention demonstrates a technique for achieving milli-joule level and higher energy, broad bandwidth laser pulses centered around 2.4 micrometer with a kilohertz and other repetition rate. The key to such technique is to start with a broadband micro-joule level seed laser at around 2.4 micrometer, which could be generated through difference frequency generation, four-wave mixing process and other methods. This micro-joule level seed laser could then be amplified to above one milli-joule through chirped pulse amplification in a Cr2+:ZnSe or Cr2+:ZnS crystal pumped by a commercially available Ho:YAG or other appropriate suitable lasers. Due to the high seed energy, fewer gain passes are needed to achieve a milli-joule level output thus significantly simplifies laser architectures. Furthermore, gain narrowing effect in a typical chirped pulse amplifier is also mitigated and thus enable a broadband output.
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公开(公告)号：US20190020166A1
公开(公告)日：2019-01-17
申请号：US16032808
申请日：2018-07-11
发明人： Zenghu Chang , Xiaoming Ren , Yanchun Yin , Lam Mach
CPC分类号： H01S3/0057 , H01S3/0092 , H01S3/0606 , H01S3/094076 , H01S3/115 , H01S3/161 , H01S3/1623 , H01S3/1625 , H01S3/1628 , H01S3/1636 , H01S3/1643 , H01S3/2308 , H01S3/2316 , H01S3/2325 , H01S3/2375
摘要： The present invention demonstrates a technique for achieving milli-joule level and higher energy, broad bandwidth laser pulses centered around 2.4 micrometer with a kilohertz and other repetition rate. The key to such technique is to start with a broadband micro-joule level seed laser at around 2.4 micrometer, which could be generated through difference frequency generation, four-wave mixing process and other methods. This micro-joule level seed laser could then be amplified to above one milli-joule through chirped pulse amplification in a Cr2+:ZnSe or Cr2+:ZnS crystal pumped by a commercially available Ho:YAG or other appropriate suitable lasers. Due to the high seed energy, fewer gain passes are needed to achieve a milli-joule level output thus significantly simplifies laser architectures. Furthermore, gain narrowing effect in a typical chirped pulse amplifier is also mitigated and thus enable a broadband output.
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