Observations of four types of pulses in a fiber laser with large net-normal dispersion

State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China.
Optics Express (Impact Factor: 3.49). 04/2011; 19(8):7616-24. DOI: 10.1364/OE.19.007616
Source: PubMed


Four different types of pulses are experimentally obtained in one erbium-doped all-fiber laser with large net-normal dispersion. The proposed laser can deliver the rectangular-spectrum (RS), Gaussian-spectrum (GS), broadband-spectrum (BS), and noise-like pulses by appropriately adjusting the polarization states. These kinds of pulses have distinctly different characteristics. The RS pulses can easily be compressed to femtosecond level whereas the pulse energy is restricted by the trend of multi-pulse shaping with excessive pump. The GS and BS pulses always maintain the single-pulse operation with much higher pulse-energy and accumulate much more chirp. After launching the pulses into the photonic-crystal fiber, the supercontinuum can be generated with the bandwidth of >700 nm by the BS pulses and of ~400 nm by the GS pulses, whereas it can hardly be generated by the RS pulses. The physical mechanisms behind the continuum generation are qualitatively investigated relating to different operating regimes. This work could help to a deeper insight of the normal-dispersion pulses.

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Available from: Dong Mao, Aug 27, 2014
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    • "Based on the previously published reports, the lowest attainable repetition rate was 173.05 kHz, which was obtained by inserting 1.16 km of highly non-linear fibre (HNLF) [6]. DSR pulse is also observed to be able to maintain single pulse operation, compared with the conventional DS pulse where DS pulse broke into five pulses at maximum available pump power [7]. The majority of the experiments conducted adopted a long piece of fibre such as single mode fibre (SMF) and HNLF. "

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    • "A linearly polarized fiber laser was obtained using a short section of highly polarizing PCF[78], as depicted in Figure 9. Passive mode locking was also obtained in erbium-doped fiber ring lasers: using a highly nonlinear PCF with low and flat dispersion[79], or using a hollowcore PCF filled with few-layered grapheme oxide solu- tion[80]or even through a solid-core highly nonlinear PCF[81]. Using a near-zero dispersion highly nonlinear PCF, a fiber laser with four types of pulses was obtained[82]. Some authors applied PCFs to the development ofBrillouin-erbium fiber lasers: using 20 m of polarization maintaining PCF[83], or using 20 m of PCF and 49 cm of bismuth-erbium-doped fiber[84], or even by using 20 m polarization maintaining PCF and 49 cm of bismutherbium-doped fiber[85]. "
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    ABSTRACT: A review on all-fiber lasers based on photonic crystal fibers is presented. Photonic crystal fibers present improved features beyond what conventional optical fibers can offer. Due to their geometric versatility, photonic crystal fibers can present special properties and abilities which can lead to enhanced lasing structures. A brief description of photonic crystal fibers and fiber laser’s properties is presented. All-fiber laser structures developed using photonic crystal fibers are described and divided in two groups, depending on the cavity topology: ring cavity fiber lasers and linear cavity fiber lasers. All-fiber lasers applications in the photonic crystal fiber related sensing field are described
    No preview · Article · Nov 2013 · Nanophotonics
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    • "Especially, solitons based on fiber lasers offer a platform of building new types of modelocking lasers [3]–[11]. The mode-locking fiber lasers have become a platform for exhibiting various nonlinear phenomena, including the formation of soliton rain [4], dissipative solitons [5]–[14], harmonic solitons [15], vector solitons [16], [17], and bound-state pulses [18]–[21], as well as the dissipative soliton resonance [6], [22], [23] (or wave-breaking-free pulses [3], [7], [24]). In previous works, bound states have become an attractive topic in nonlinear optical fiber systems in both theoretical and experimental fields [25]–[31]. "
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    ABSTRACT: We have investigated the generation and propagation of robust bound-state pulses emitted from a passively mode-locked figure-eight laser with net-anomalous dispersion. Two pulses with the pulse duration of $\sim$1.3 ps and the separation of $\sim$2.2 ps exhibit a strongly modulated spectral profile. The experimental observations show that the pulse duration and the separation increase approximately linearly along the extracavity single-mode fiber (SMF). The pulse duration and separation are broadened by a factor of $\sim$7 and $\sim$5.7, respectively, after the pulse pair propagates through the standard SMF of 202 m. The theoretical results well agree with the experimental observations.
    Full-text · Article · Apr 2012 · IEEE Photonics Journal
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