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논문 기본 정보

자료유형
학술저널
저자정보
Byeong-Jun Park (Chungnam National University) Ji-Yeon Song (Chungnam National University) Seong-Yeon Lee (Chungnam National University) Ki-Ju Yee (Chungnam National University)
저널정보
한국광학회 Current Optics and Photonics Current Optics and Photonics Vol.6 No.4
발행연도
2022.8
수록면
407 - 412 (6page)

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초록· 키워드

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We report on a diode-laser-pumped mode-locked Yb:KGW laser system, which delivers ultrashort pulses down to 89 fs at a repetition rate of 63 ㎒, with an average power of up to 5.6 W. A fiber-coupled diode laser at 981 ㎚, operated with a compact driver, is used to optically pump the gain crystal via an off-axis parabolic mirror. A semiconductor saturable-absorber mirror is used to initiate the pulsed operation. Laser characteristics such as the pulse duration, spectrum bandwidth, and output power are investigated by varying the intracavity dispersions via changing the number of bounces between negative-dispersive mirrors within the cavity. Short pulses with a duration of 89 fs, a center wavelength of 1,027 ㎚, and 3.6 W of output power are produced at a group-velocity dispersion (GVD) of −3,300 fs². As the negative GVD increases, the pulse duration lengthens but the output power at the single-pulse condition can be enhanced, reaching 5.6 W at a GVD of −6,600 fs². Because of pulse broadening at high negative GVDs, the highest peak intensity is achievable at a moderate GVD with our system.

목차

Ⅰ. INTRODUCTION
Ⅱ. EXPERIMENTAL SETUP
Ⅲ. RESULTS AND DISCUSSION
Ⅳ. CONCLUSIONS
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