On the formation of noise-like pulses in fiber ring cavity configurations

Jeong, Yoonchan; Vazquez-Zuniga, Luis Alonso; Kwon, Young Ho

doi:10.1016/j.yofte.2014.07.004

Cited by 165 publications

(85 citation statements)

References 59 publications

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“…It consists in producing a train of periodic pulses at a repetition rate that is an integer multiple of the cavity fundamental frequency [38], which is particularly attractive for optical communications. HML is not the exclusivity of soliton lasers and several cases of HML noise-like pulsing regimes have been observed [7,39,40].…”

Section: Introductionmentioning

confidence: 99%

High energy noise-like pulsing in a double-clad Er/Yb figure-of-eight fiber laser

et al. 2016

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In this work, we study a 215-m-long figure-of-eight fiber laser including a double-clad erbium-ytterbium fiber and a nonlinear optical loop mirror based on nonlinear polarization evolution. For proper adjustments, self-starting passive mode-locking is obtained. Measurements show that the mode-locked pulses actually are noise-like pulses, by analyzing the autocorrelation, scope traces and the very broad and flat spectrum extending over a record bandwidth of more than 200 nm, beyond the 1750 nm upper wavelength limit of the optical spectrum analyzer. Noise-like pulsing was observed for moderate and high pump power preserving the same behavior, reaching pulse energies as high as 300 nJ, with pulse durations of a few tens of ns and a coherence length in the order of 1 ps. Stable fundamental mode locking as well as harmonic mode locking up to the 6th order were observed. The bandwidth was further extended to more than 450 nm when a 100-m piece of highly nonlinear fiber was inserted at the laser output. The enhanced performances obtained compared to other similar schemes could be related to the absence of a polarizer in the present setup, so that the state of polarization along the cavity is no longer restricted.

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Section: Introductionmentioning

confidence: 99%

High energy noise-like pulsing in a double-clad Er/Yb figure-of-eight fiber laser

et al. 2016

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“…레이저의 출력 수준이 상승하고, 빔 품질이 향상됨에 따라 레이저는 통신, 정밀 측 정, 바이오, 의료에서부터 대형 구조물의 드릴링, 용접, 절단, 또한, 국방에 이르기까지 폭넓은 분야에서 중추적인 기술 요 소로 자리 매김을 하고 있다 [1][2][3][4][5][6][7][8] . 레이저 시스템은 다양한 방 식으로 구성될 수 있는데, 최근에는 광섬유를 이득 매질로 하는 광섬유 레이저가 벌크(Bulk) 방식 레이저 시스템과 대 비되는 다양한 장점에 힘입어 많은 연구 및 개발 관심을 받 고 있다 [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] . [11] .…”

Section: 서 론unclassified

Current Status and Prospects of High-Power Fiber Laser Technology (Invited Paper)

Kwon¹,

Park²,

Lee³

et al. 2016

Korean Journal of Optics and Photonics

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Over the past two decades, fiber-based lasers have made remarkable progress, now having reached power levels exceeding kilowatts and drawing a huge amount of attention from academy and industry as a replacement technology for bulk lasers. In this paper we review the significant factors that have led to the progress of fiber lasers, such as gain-fiber regimes based on ytterbium-doped silica, optical pumping schemes through the combination of laser diodes and double-clad fiber geometries, and tandem schemes for minimizing quantum defects. Furthermore, we discuss various power-limitation issues that are expected to incur with respect to the ultimate power scaling of fiber lasers, such as efficiency degradation, thermal hazard, and system-instability growth in fiber lasers, and various relevant methods to alleviate the aforementioned issues. This discussion includes fiber nonlinear effects, fiber damage, and modal-instability issues, which become more significant as the power level is scaled up. In addition, we also review beam-combining techniques, which are currently receiving a lot of attention as an alternative solution to the power-scaling limitation of high-power fiber lasers. In particular, we focus more on the discussion of the schematics of a spectral beam-combining system and their individual requirements. Finally, we discuss prospects for the future development of fiber laser technologies, for them to leap forward from where they are now, and to continue to advance in terms of their power scalability.

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“…To obtain stable mode-locking and avoid unwanted nonlinear effects for practical applications, they are typically expected to operate in the single-pulse regime with a moderate spectral width confined by the gain media [3][4][5]. At the other extreme, the unstable/partial mode-locking regime, characterized by a seemingly regular train of noise-like pulse (NP) with a smooth and broad averaged spectrum [6], has recently attracted particular attention [7][8][9][10][11][12]. This is inspired by its fundamental physical studies [13], particularly the possible connection with the rogue wave (RW) generation [14][15][16][17][18].…”

mentioning

confidence: 99%

“…This is inspired by its fundamental physical studies [13], particularly the possible connection with the rogue wave (RW) generation [14][15][16][17][18]. NP mode-locking has been realized through dispersion management [6][7][8], cavity length elongation [9,10], and nonlinearity enhancement [11,12]. Although a longer red-shifted wavelength has been observed to facilitate the rare event generation [14], the optical spectra of prior NP mode-locking were limited by fiberbased configurations.…”

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confidence: 99%

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1000–1400-nm partially mode-locked pulse from a simple all-fiber cavity

Wei

Wong

2015

Opt. Lett.

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We demonstrate a partially mode-locked pulse laser delivering ultra-wideband optical spectrum, i.e., 1000-1400 nm at 30 dB, from a simple all-fiber short cavity with all-normal dispersion. Examined by both real-time temporal and spectral analyzers, the partially mode-locked pulse exhibits double-scale noise-like characteristics-the fast L-shaped mode-locked pulse modulated by slow free-running Q-switched envelopes. Moreover, the statistical analysis as a function of its optical bandwidth shows that the spectral tuning does not compromise the temporal stability, but affects the pulsing periodicity. It is believed that the wide spectrum of knowledge obtained here would enrich the field of noise-like pulse, such as being beneficial to the rogue wave generation.

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On the formation of noise-like pulses in fiber ring cavity configurations

Cited by 165 publications

References 59 publications

High energy noise-like pulsing in a double-clad Er/Yb figure-of-eight fiber laser

High energy noise-like pulsing in a double-clad Er/Yb figure-of-eight fiber laser

Current Status and Prospects of High-Power Fiber Laser Technology (Invited Paper)

1000–1400-nm partially mode-locked pulse from a simple all-fiber cavity

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