Wavelength-Tunable, Passively Mode-Locked Erbium-Doped Fiber Master-Oscillator Incorporating a Semiconductor Saturable Absorber Mirror

Vazquez-Zuniga, Luis Alonso; Jeong, Yoonchan

doi:10.3807/josk.2013.17.2.117

Cited by 15 publications

(9 citation statements)

References 49 publications

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“…Since frequency down-conversion techniques like IDFG arise from quadratic [χ (2) type] nonlinear optical effects, the intensity of the driving pump pulse and its associated pulse duration have a strong impact on the conversion efficiency of the process [81]. Using the few-cycle pulses directly available from Cr:ZnS/ZnSe oscillators, as demonstrated in this thesis, will thus provide significant advantage over existing femtosecond pump sources like Er/Tm-fiber lasers [82,83] and optical parametric generators/amplifiers [84] due to their intrinsically much shorter pulse durations. The need for intricate and alignment-sensitive post-compression chains based on multipass (Herriott) cells [85] or nonlinear fibers [35] is eliminated, greatly simplifying the overall design.…”

Section: Direct Generation Of Few-cycle Laser Pulsesmentioning

confidence: 99%

A New Generation of Ultrafast Oscillators for Mid-Infrared Applications

Nagl¹

2021

Springer Theses

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The mid-infrared (MIR) spectral range with wavelengths between 2 µm and 20 µm holds tremendous potential for the study of complex biological systems, given the abundance of intense and unique molecular absorption lines that can be detected. Consequently, spectroscopic applications of mid-infrared radiation have garnered enormous attention in recent years. A particularly striking example is the combination of multi-MHz-repetition-rate, few-cycle MIR light sources with electric-field-resolved techniques, enabling the recording of amplitude-and phase-resolved molecular signals with unparalleled specificity and shot noise limited sensitivity. Despite the ever-growing research demand, their widespread use is severely hampered by the lack of low-noise, compact, and ultrafast laser systems.In this dissertation, a new generation of table-top mid-infrared laser sources is presented, bringing cutting-edge laser diode technology and few-cycle Cr 2+ :ZnS/ZnSe solid-state oscillators together for the first time. Not only have these laser systems proven to reliably provide coherent radiation in the 2 µm to 3 µm region, the simultaneous reduction in size and complexity, accompanied by an improved overall efficiency and -most importantly -noise performance, renders this approach as pioneering for future MIR applications.In total, three laser systems are developed, each of them pushing the frontiers of directly diode-pumped laser technology. The first one is driven by a single-emitter indium phosphide laser diode and delivers more than 500 mW of output power combined with pulse durations as short as 45 fs. With this first ever directly diodepumped Kerr-lens mode-locked (KLM) Cr 2+ :ZnS/ZnSe oscillator, experimental results confirm a highly stable operation. In addition, amplitude noise measurements reveal an excellent low-noise performance of the mode-locked laser output.Driven by the desire to match and exceed the performance of more mature fiber-laser-pumped counterparts and also to boost the efficiency of the envisaged downstream applications, the output of two single-emitter pump laser diodes is carefully combined and implemented into a second-generation design. The achieved peak powers are almost three-times higher compared to before, while the low-noise performance of the KLM output is maintained.xii Typically, the design architecture of laser systems used for generating mid-infrared radiation up to several tens of microns includes a sophisticated chain of amplification, pulse compression and parametric conversion stages. Using a powerful few-cycle mid-infrared oscillator as driving laser source instead not only significantly improves the effectiveness of these nonlinear schemes, but could even supersede the need for initial amplification. The presented third-generation system brings the directly diode-pumped Cr 2+ :ZnS/ZnSe solid-state laser technology to a new level; with output peak powers reaching 1 MW and pulse durations as short as 28 fs, direct generation of CEP-stable mid-infrared pulses in a nonlinear optical cryst...

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Section: Direct Generation Of Few-cycle Laser Pulsesmentioning

confidence: 99%

A New Generation of Ultrafast Oscillators for Mid-Infrared Applications

Nagl¹

2021

Springer Theses

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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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“…Except for the SESAM arrangement, fiber and fiberized components are used throughout. It is based on the mode-locked laser presented in [9] (i.e., the version without a tunable filter). The SESAM ensures that pulsing self-starts whereas nonlinear polarization evolution adds additional pulse shaping [9].…”

Section: Introductionmentioning

confidence: 99%

Ultrashort Pulse Generation in Modeless Laser Cavity

Cheng

Feng

Ding

et al. 2022

J. Lightwave Technol.

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We demonstrate experimentally that random phase modulation of an erbium-doped fiber ring-laser by an intra-cavity electro-optic phase modulator did not inhibit ultrashort-pulse operation. Stable and self-starting ultrashort-pulse operation with a single pulse circulating in the cavity was achieved even when the phase modulator was driven with random sequences sufficiently fast and strong to render the laser cavity modeless, in the sense that heterodyning of the laser output did not show any spectral lines corresponding to a mode spectrum. No significant change in measured pulse characteristics was observed, compared to conventional mode-locking in the unmodulated cavity. The insensitivity to the random phase modulation is expected, given the lack of phase-sensitive elements in the cavity.

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Wavelength-Tunable, Passively Mode-Locked Erbium-Doped Fiber Master-Oscillator Incorporating a Semiconductor Saturable Absorber Mirror

Cited by 15 publications

References 49 publications

A New Generation of Ultrafast Oscillators for Mid-Infrared Applications

A New Generation of Ultrafast Oscillators for Mid-Infrared Applications

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

Ultrashort Pulse Generation in Modeless Laser Cavity

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