Mode locking of a coherent random fiber laser with selectable repetition rates

Hu, Bo; Cui, Han; Zhang, Yan Li; Ma, Rui; Xiao, Yong Chuan; Qu, Peng Fei; Zhang, Wei Li

doi:10.1364/oe.409974

Cited by 11 publications

(11 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It should be noted that the RD-FP cavity array differs significantly from the RD-FBG arrays mentioned above. The coherent RFLs based on RD-FBG arrays support random localized modes only within a narrow and specific wavelength range . However, due to the flat and broad spectral reflectivity curve of Au films, the proposed RD-FP cavity array is suitable for ultra-wide-band applications.…”

Section: Principle and Experimental Setupmentioning

confidence: 99%

Coherent Random Fiber Laser-Enabled Super-Resolution Spectroscopy

2023

View full text Add to dashboard Cite

Inspired by single-molecule localization microscopy, super-resolution spectroscopy has been achieved by sparse sampling in the spectral domain, where a light source capable of randomly emitting sparse peaks plays a crucial role. Due to the intrinsic feedback mechanism of disordered light scattering, random lasers can provide the desired emission characteristics that facilitate reconstructing the detailed spectral profiles of samples. Here, we propose an all-fiber-configured coherent random laser for spectral measurement to break the instrumental response limitation of spectral detection systems. The laser remains in a chaotic regime and exhibits self-modulating spectral behavior by introducing an elaborately designed spectral tailoring element inside the cavity. The statistical number and distribution of the random peaks over the emission spectrum can be manipulated by adjusting the pump power. In addition, the laser exhibits several attractive features, such as low pumping threshold, narrow-line-width lasing modes, flexible operating wavelength range, high optical signal-to-noise ratio, and easy compatibility with optical fiber systems. Using a low-resolution spectrograph, we experimentally demonstrate super-resolution spectrum reconstruction, obtaining a spectral enhancement of around 3.3. This work provides a powerful illumination source and realization method for high-resolution spectroscopy, which is an essential tool for future optical information applications.

show abstract

Section: Principle and Experimental Setupmentioning

confidence: 99%

Coherent Random Fiber Laser-Enabled Super-Resolution Spectroscopy

2023

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

“…Random lasers [5,6,7] are based on a stochastic distribution of scattering centres that help form an effective cavity with laser modes, even when a laser mirror is lacking [8,9,10]. The random mode-spacing makes it difficult to lock the phases of the modes to each other [11][12][13][14][15][16][17]. Modelocking random lasers where the gain and scattering coexist spatially, as in dyes [6] or semiconductor powders [18], is even more challenging.…”

mentioning

confidence: 99%

“…Modelocking random lasers where the gain and scattering coexist spatially, as in dyes [6] or semiconductor powders [18], is even more challenging. For this reason, few random laser reports exist on locking the spatial modes [11][12][13][14][15][16] and the longitudinal modal distribution [17], and none to the Fourier transform limit.The generation of transform-limited pulses in random lasers can be attempted in a simplified system. In random single-mode fibre lasers [19], the complexity is reduced to one spatial dimension.…”

mentioning

confidence: 99%

See 1 more Smart Citation

A mode-locked random laser generating transform-limited optical pulses

Weid

Correia

Tovar

et al. 2023

Preprint

View full text Add to dashboard Cite

Ever since the mid-1960’s, locking the phases of modes enabled the generation of laser pulses of duration limited only by the uncertainty principle, opening the field of ultrafast science. In contrast to conventional lasers, random lasers usually lack at least a mirror and generally emit broadband low-coherence light. They have, nevertheless, cavity modes that distinguish them from amplifiers and superluminescent light sources. Mode spacing in random lasers is ill-defined because optical feedback comes from scattering centres at random positions. Although progress has been made towards locking spatial and longitudinal modes in random lasers, the literature lacks reports on transform-limited pulse generation despite the many decades of the field. Here the generation of sub-nanosecond transform-limited pulses from a mode-locked random fibre laser is described. Exceedingly weak (<-73 dB) Rayleigh backscattering from decimetre-long sections of telecom fibre serves as laser feedback, providing narrow spectral selectivity to the Fourier limit. This unique laser is adjustable in pulse duration (0.34-20 ns), repetition rate (0.714-1.05 MHz) and can be temperature tuned. The high spectral-efficiency pulses are applied in distributed temperature sensing with 9.0 cm and 3.3x10-3 K resolution, exemplifying how the results can drive advances in the fields of spectroscopy, telecommunications, and sensing.

show abstract

“…So far, most RFLs operate in the continuous-wave (CW) regime, while pulsed RFLs are more desirable in applications such as laser marking, laser cleaning and nonlinear frequency conversion due to their high peak power. In recent years, several pulse generation mechanisms have been adopted to realize pulsed laser emission from RFLs, such as active acousto-optic (AO) Q -switching [ 17 ] , polarization modulation [ 18 ] , mode-locking (ML) with a saturable absorber [ 19 , 20 ] , nonlinear polarization rotation (NPR) [ 21 ] and synchronous pumping [ 22 ] . However, it is difficult to obtain high-peak-power pulses with these methods due to their intrinsic drawbacks.…”

Section: Introductionmentioning

confidence: 99%

High-peak-power random Yb-fiber laser with intracavity Raman-frequency comb generation

Liu

Zhang

et al. 2022

High Pow Laser Sci Eng

View full text Add to dashboard Cite

Random fiber laser (RFL) has been an excellent platform for exploring novel optical dynamics and developing new functional optoelectronic devices. However, it is challenging for RFLs to regulate their emission into regular narrow pulses due to their intrinsic randomness. Here, through engineering the laser configuration (cavity Q value, gain distribution and nonlinearity), we demonstrate that narrow (~2.5 ns) pulses with record peak power as high as 64.3 kW are achieved from a self-Q-switched random ytterbium fiber laser.Based on high intracavity intensity and efficient interplay of multiple nonlinear processes (SBS, SRS and FWM), an over-one-octave visible-NIR Raman frequency comb is generated from single-mode silica fibers for the first time. After spectrally filtering the Raman peaks, wavelength-tunable pulses with duration of several hundreds of picoseconds are obtained.Such kind of high-peak-power random Q-switched fiber laser and wide frequency comb in the visible-NIR region can find application in diverse areas, such as spectroscopy, biomedical imaging, and quantum information.

show abstract

Mode locking of a coherent random fiber laser with selectable repetition rates

Cited by 11 publications

References 35 publications

Coherent Random Fiber Laser-Enabled Super-Resolution Spectroscopy

Coherent Random Fiber Laser-Enabled Super-Resolution Spectroscopy

A mode-locked random laser generating transform-limited optical pulses

High-peak-power random Yb-fiber laser with intracavity Raman-frequency comb generation

Contact Info

Product

Resources

About