[특허]High power femtosecond laser with variable repetition rate

High power femtosecond laser with variable repetition rate 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H01S-003/10 A61F-009/008 H01S-003/00 H01S-003/23
출원번호	US-0581623 (2014-12-23)
등록번호	US-9325148 (2016-04-26)
발명자 / 주소	Karavitis, Michael
출원인 / 주소	Alcon LenSx, Inc.
대리인 / 주소	Latimer, S. Brannon
인용정보	피인용 횟수 : 0 인용 특허 : 34

초록 ▼

Designs and techniques for constructing and operating femtosecond pulse lasers are provided. One example of a laser engine includes an oscillator that generates and outputs a beam of femtosecond seed pulses, a stretcher-compressor that stretches a duration of the seed pulses, and an amplifier that receives the stretched seed pulses, amplifies an amplitude of selected stretched seed pulses to create amplified stretched pulses, and outputs a laser beam of amplified stretched pulses back to the stretcher-compressor that compresses their duration and outputs a laser beam of femtosecond pulses. The amplifier includes a dispersion controller that compensates a dispersion of the amplified stretched pulses, making the repetition rate of the laser adjustable between procedures or according to the speed of scanning. The laser engine can be compact with a total optical path of less than 500 meters, and have a low number of optical elements, e.g. less than 50.

대표청구항 ▼

1. A method of scanning with a laser system, the method comprising: generating femtosecond seed pulses by an oscillator;stretching a duration of the seed pulses by a stretcher;amplifying stretched seed pulses by an amplifier into laser pulses;compensating a group delay dispersion of the laser pulses in the range of 5,000-20,000 fs2 with a dispersion compensator between end-mirrors of the amplifier;outputting the laser pulses from the amplifier by an electro-optical modulator at a first repetition rate;compressing a duration of the laser pulses to the range of 1-1,000 fs by a compressor;focusing the laser pulses to a focus spot in a first target region with a scanning laser delivery system;scanning the focus spot with the first repetition rate in the first target region with the scanning laser delivery system;changing the first repetition rate to a second repetition rate with a repetition-rate controller; andscanning the focus spot with the second repetition rate in a second target region with the scanning laser delivery system. 2. The method of claim 1, wherein: the first target region is at least one of a lens region and a cataract region, andthe second target region is a corneal region. 3. The method of claim 1, wherein: the first target region is a corneal region, andthe second target region is at least one of a lens region and a cataract region. 4. The method of claim 1, wherein: the first repetition rate is less or equal to 100 kHz; andthe second repetition rate is greater than 100 kHz. 5. The method of claim 4, wherein: the second repetition rate is 150 kHz. 6. The method of claim 1, wherein: the compressor and the stretcher are integrated into a stretcher-compressor. 7. The method of claim 1, wherein: the electro-optical modulator includes a switchable polarizer,configured to rotate a polarization plane of the stretched pulses in the amplifier,the switchable polarizer having a rise time less than 5 ns. 8. The method of claim 7, the scanning laser delivery system comprising: a control electronics configured to apply control signals to the switchable polarizer to cause the switchable polarizer to switch with a rise time of less than 5 ns. 9. The method of claim 1, the changing the first repetition rate to a second repetition rate comprising: changing a number of roundtrips of laser pulses before outputting the laser pulses from the amplifier by the electro-optical modulator. 10. The method of claim 1, the changing the first repetition rate to a second repetition rate comprising: changing the first repetition rate to the second repetition rate in a time in the range of 1 μsec-1 sec.

이 특허에 인용된 특허 (34)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

High power femtosecond laser with variable repetition rate 원문보기

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High power femtosecond laser with variable repetition rate 원문보기

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연구과제 타임라인

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이 특허에 인용된 특허 (34)

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