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公开(公告)号：US20130342895A1
公开(公告)日：2013-12-26
申请号：US13973152
申请日：2013-08-22
Applicant: Massachusetts Institute of Technology
Inventor： Bien Chann , Tso Yee Fan , Antonio Sanchez-Rubio , Steven J. Augst
IPC: H01S3/13
CPC classification number: H01S3/1307 , G03F7/70033 , G03F7/7085 , H01S3/005 , H01S3/0057 , H01S3/0071 , H01S3/0085 , H01S3/0092 , H01S3/06754 , H01S3/2308 , H01S3/2391 , H04B10/564
Abstract: A method and apparatus for providing a high peak power optical beam. The method includes interleaving pulse trains of different wavelengths and spatially and temporally overlapping the different wavelengths to produce an amplified output beam with very high peak power.
Abstract translation: 一种用于提供高峰值功率光束的方法和装置。 该方法包括交织不同波长的脉冲串，并在时间上与不同波长重叠以产生具有非常高峰值功率的放大输出光束。
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Patent Agency Ranking
公开(公告)号：US12066679B2
公开(公告)日：2024-08-20
申请号：US17130598
申请日：2020-12-22
Applicant: Massachusetts Institute of Technology
Inventor： Steven J. Augst , Peter O'Brien , Jonathan Wilson
Abstract: High-power light absorbers (HPLAs) can exhibit low back-scattered light, mitigate stray light, and withstand high optical power. The absorbers can be used with or without baffling as beam dumps for high-power lasers. An HPLA may include a substrate made of high thermally conductive material with an anti-reflection (AR) coating formed on the substrate. A thin layer of highly absorbing material may be located between the AR coating and substrate. The substrate can be cooled with a fluid, such as water or air.
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公开(公告)号：US10374379B2
公开(公告)日：2019-08-06
申请号：US15261541
申请日：2016-09-09
Applicant: Massachusetts Institute of Technology
Inventor： Steven J. Augst
Abstract: A fiber amplifier includes an isolator, a gain fiber to amplify an input laser signal, and an optical filter disposed between the isolator and the gain fiber. The optical filter transmits the laser signal and reflects amplified spontaneous emission (ASE) propagating from the gain fiber toward the isolator. The reflected ASE reenters the gain fiber and is absorbed by the gain fiber for amplifying the input laser signal. The optical filter in the amplifier can protect the usually expensive isolator and reduce potential damage to the gain fiber induced by fluctuation of the input laser signal power, as well as reduce potential photodarkening at the input of the gain fiber.
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公开(公告)号：US11108209B2
公开(公告)日：2021-08-31
申请号：US16864290
申请日：2020-05-01
Applicant: Massachusetts Institute of Technology
Inventor： Steven J. Augst , Kelsey Yee , Franklin Jose
IPC: H01S3/067 , H01S3/30 , H01S3/0941 , H01S3/094
Abstract: Stimulated Brillouin scattering (SBS) limits the maximum power in fiber lasers with narrow linewidths. SBS occurs when the power exceeds a threshold proportional to the beam area divided by the effective fiber length. The fiber lasers disclosed here operate with higher SBS power thresholds (and hence higher maximum powers at kilohertz-class linewidths) than other fiber lasers thanks to several techniques. These techniques include using high-absorption gain fibers, operating the laser with low pump absorption (e.g., ≤80%), reducing the length of un-pumped gain fiber at the fiber output, foregoing a delivery fiber at the output, foregoing a cladding light stripper at the output, using free-space dichroic mirrors to separate signal light from unabsorbed pump light, and using cascaded gain fibers with non-overlapping Stokes shifts. The upstream gain fiber has high absorption and a larger diameter for high gain, and subsequent gain fiber has a smaller diameter to improve beam quality.
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公开(公告)号：US20180261969A1
公开(公告)日：2018-09-13
申请号：US15261541
申请日：2016-09-09
Applicant: Massachusetts Institute of Technology
Inventor： Steven J. Augst
CPC classification number: H01S3/06754 , H01S3/0014 , H01S3/0064 , H01S3/0078 , H01S3/0675 , H01S3/06758 , H01S3/08009 , H01S3/094023 , H01S3/09408 , H01S3/09415 , H01S3/10015 , H01S3/10023 , H01S3/1608 , H01S3/161 , H01S3/1616 , H01S3/1618 , H01S2301/02
Abstract: A fiber amplifier includes an isolator, a gain fiber to amplify an input laser signal, and an optical filter disposed between the isolator and the gain fiber. The optical filter transmits the laser signal and reflects amplified spontaneous emission (ASE) propagating from the gain fiber toward the isolator. The reflected ASE reenters the gain fiber and is absorbed by the gain fiber for amplifying the input laser signal. The optical filter in the amplifier can protect the usually expensive isolator and reduce potential damage to the gain fiber induced by fluctuation of the input laser signal power, as well as reduce potential photodarkening at the input of the gain fiber.
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公开(公告)号：US09136667B2
公开(公告)日：2015-09-15
申请号：US13973152
申请日：2013-08-22
Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
Inventor： Bien Chann , Tso Yee Fan , Antonio Sanchez-Rubio , Steven J. Augst
CPC classification number: H01S3/1307 , G03F7/70033 , G03F7/7085 , H01S3/005 , H01S3/0057 , H01S3/0071 , H01S3/0085 , H01S3/0092 , H01S3/06754 , H01S3/2308 , H01S3/2391 , H04B10/564
Abstract: A method and apparatus for providing a high peak power optical beam. The method includes interleaving pulse trains of different wavelengths and spatially and temporally overlapping the different wavelengths to produce an amplified output beam with very high peak power.
Abstract translation: 一种用于提供高峰值功率光束的方法和装置。 该方法包括交织不同波长的脉冲串，并在时间上与不同波长重叠以产生具有非常高峰值功率的放大输出光束。
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