Noise-Like Pulse Generation Using Polarization Maintaining Mode-Locked Thulium-Doped Fiber Laser With Nonlinear Amplifying Loop Mirror

Michalska, Maria; Świderski, Jacek

doi:10.1109/jphot.2019.2943709

Cited by 44 publications

(14 citation statements)

References 33 publications

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“…We used the aforementioned photodetector and a 63 GHz digital oscilloscope (DSO-X 96204Q, Keysight Technologies, Inc.) to check the pulse characteristics. [14], [15]. This means that the NAbLM can still function well when the loop is not long and in a considerably different dispersion regime.…”

Section: Resultsmentioning

confidence: 99%

Nonlinear Absorbing-Loop Mirror in a Holmium-Doped Fiber Laser

Zhao

Zhou

Jiang

et al. 2020

J. Lightwave Technol.

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Nonlinear amplifying-loop mirror (NALM) and nonlinear optical loop mirror (NOLM) are two basic Sagnac interferometers widely used in mode-locked fiber lasers. Here we construct a novel variant by replacing the amplifier in an NALM with an absorber, which forms a type of nonlinear absorbing-loop mirror (NAbLM). The optical waves counter-propagating within an ideal NAbLM possess equal optical powers when they return and interfere inside the used fiber coupler owing to the equal absorptions. Meanwhile, their nonlinear phase shifts can still differ if an asymmetric distribution of the absorber is employed. We theoretically predict that, in comparison to typical NALM and NOLM, the NAbLM can achieve relatively higher extinction ratio and larger modulation depth, resting on the unique equal-power interference. We then first used it as a saturable absorber in a holmium-doped fiber laser and achieved passively mode-locked operations in both normal and anomalous dispersion regimes. In the normal dispersion regime, h-shaped pulse was generated; whereas in the anomalous dispersion regime, both noise-like and dissipative-soliton-resonance-like pulses could be produced. NAbLM enables more options in nonlinear fiber optics especially when a high extinction ratio or large modulation depth is required.

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Section: Resultsmentioning

confidence: 99%

Nonlinear Absorbing-Loop Mirror in a Holmium-Doped Fiber Laser

Zhao

Zhou

Jiang

et al. 2020

J. Lightwave Technol.

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“…The available choice of artificial saturable absorbers used for mode locking in fibre lasers may be consulted in [16]. In configurations for generation of noise-like pulses, such artificial saturable absorbers are most frequently used as NPE, non-linear optical loop mirrors [24][25][26][27], non-linear amplifying loop mirrors [28][29][30][31], and spatial filters relying on fibre type transitions such as SMF-MMF-SMF [32][33][34][35][36]. It does not appear possible to name a certain of these absorbers as the best, since all of them have their own peculiar advantages and drawbacks.…”

Section: Mode Locking Via Other Artificial Absorbersmentioning

confidence: 99%

Incoherent laser

Kobtsev¹

2022

Advanced Lasers, High-Power Lasers, and Applications XIII

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The report considers prospects of development, on the basis of fibre lasers, of an 'incoherent laser' producing noise-like pulses. The possibility is demonstrated of a radically new radiation source occupying, in terms of output properties, an intermediate place between incandescent bulb and laser. Combination in such a laser of high output beam directivity, brightness and incoherent character of the radiation is quite important in many applications where speckle patterns of the light field are an undesirable effect.

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“…NLP can be generated with different techniques: saturable absorber [14,15], nonlinear polarization rotation (NPR) [16][17][18][19], nonlinear optical loop mirrors(NOLM) [20], nonlinear amplifying loop mirror(NALM) [21][22][23][24], and NOLM in combination with NPR [25]. [25].…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we report an all-PM all-fiber TDFL based on NOLM operating at NLP regimes with a broadband spectrum. Compared with the previously reported NLP generation oscillator based on NALM [22,23], we choose only a piece of short thulium-doped fiber (9.5 cm) as the gain medium and only one pump source, which makes our laser more efficient and economical. In this way, a modelocked fiber laser with 32 nm FWHM and 13.51 nJ pulse energy at the fundamental pulse repetition frequency of 5.96 MHz is achieved at noise-like pulse regimes.…”

Section: Introductionmentioning

confidence: 99%

All-Polarization Maintaining Noise-Like Pulse From Mode-Locked Thulium-Doped Fiber Laser Based on Nonlinear Loop Mirror

Yun-hong

Zheng

et al. 2022

IEEE Photonics J.

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In this paper, we present a figure-eight allpolarization maintaining thulium-doped mode-locked fiber laser based on a nonlinear optical loop mirror operating at noise-like pulse regimes. The total cavity length is 34.5 m, and the calculated net group delay dispersion is estimated to be ~-2.616 ps 2 . At the maximum pump power, stable noise-like pulse centered at 1943 nm with a spectral full width at half maximum of 32 nm, a pulse energy of 13.51 nJ, and a coherence spike width of 236 fs is generated at a repetition rate of 5.96 MHz with the signal-to-noise ratio ~64 dB. The polarization extinction ratio is >15 dB at any mode-locking operation. The slope efficiency and the output power fluctuation of the laser are 5.16% and 0.039%, respectively. The laser does not require polarization state controllers, and it holds very high stability, which is insensitive to temperature changes or mechanical vibrations. Through further amplification, it will be a good laser source for realtime interrogation of fiber Bragg gratings and supercontinuum generation.

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Noise-Like Pulse Generation Using Polarization Maintaining Mode-Locked Thulium-Doped Fiber Laser With Nonlinear Amplifying Loop Mirror

Cited by 44 publications

References 33 publications

Nonlinear Absorbing-Loop Mirror in a Holmium-Doped Fiber Laser

Nonlinear Absorbing-Loop Mirror in a Holmium-Doped Fiber Laser

Incoherent laser

All-Polarization Maintaining Noise-Like Pulse From Mode-Locked Thulium-Doped Fiber Laser Based on Nonlinear Loop Mirror

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