Self-started unidirectional operation of a fibre ring soliton laser without an isolator

Zhao, Lei; Tang, Dingkang; Cheng, Tonglei; Lu, Chao

doi:10.1088/1464-4258/9/5/009

Cited by 5 publications

(4 citation statements)

References 8 publications

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“…In the lasers mode-locked solely by nonlinear polarisation evolution, the bidirectional operation could not be obtained only above the mode-locking threshold. As soon as the conditions for reaching mode-locking operation are fulfilled, one of the directions becomes dominant over another with around 10-dB extinction ratio, leading to quasi-unidirectional generation [ 181 , 182 ]. Therefore, the simplest ring cavity design uses material saturable absorbers ( Figure 8 b).…”

Section: Ultrafast Lasersmentioning

confidence: 99%

Rotation Active Sensors Based on Ultrafast Fibre Lasers

Kudelin

Sugavanam

Chernysheva

2021

Sensors

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Gyroscopes merit an undeniable role in inertial navigation systems, geodesy and seismology. By employing the optical Sagnac effect, ring laser gyroscopes provide exceptionally accurate measurements of even ultraslow angular velocity with a resolution up to 10−11 rad/s. With the recent advancement of ultrafast fibre lasers and, particularly, enabling effective bidirectional generation, their applications have been expanded to the areas of dual-comb spectroscopy and gyroscopy. Exceptional compactness, maintenance-free operation and rather low cost make ultrafast fibre lasers attractive for sensing applications. Remarkably, laser gyroscope operation in the ultrashort pulse generation regime presents a promising approach for eliminating sensing limitations caused by the synchronisation of counter-propagating channels, the most critical of which is frequency lock-in. In this work, we overview the fundamentals of gyroscopic sensing and ultrafast fibre lasers to bridge the gap between tools development and their real-world applications. This article provides a historical outline, highlights the most recent advancements and discusses perspectives for the expanding field of ultrafast fibre laser gyroscopes. We acknowledge the bottlenecks and deficiencies of the presented ultrafast laser gyroscope concepts due to intrinsic physical effects or currently available measurement methodology. Finally, the current work outlines solutions for further ultrafast laser technology development to translate to future commercial gyroscopes.

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Section: Ultrafast Lasersmentioning

confidence: 99%

Rotation Active Sensors Based on Ultrafast Fibre Lasers

Kudelin

Sugavanam

Chernysheva

2021

Sensors

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“…For instance, in the lasers mode-locked by NPE the bidirectional generation could be achieved only bellow the mode-locking threshold, during continuous wave operation. As soon as the mode-locking was initiated, one of the directions dominates over another, giving, therefore, an isolator-free quasi-unidirectional generation with net extinction ratio around 10 dB [26,27]. Such behaviour refers to NPE mode-locking when the role of the nonlinearity-induced directional symmetry breaking is high.…”

Section: Introductionmentioning

confidence: 99%

Isolator-free switchable uni- and bidirectional hybrid mode-locked erbium-doped fiber laser

et al. 2016

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An Erbium-doped fibre ring laser hybrid mode-locked with single-wall carbon nanotubes (SWNT) and nonlinear polarisation evolution (NPE) without an optical isolator has been investigated for various cavity conditions. Precise control of the state of polarisation (SOP) in the cavity ensures different losses for counter-propagating optical fields. As the result, the laser operates in quasi-unidirectional regime in both clockwise (CW) and counter-clockwise (CCW) directions with the emission strengths difference of the directions of 22 dB. Furthermore, by adjusting the net birefringence in the cavity, the laser can operate in a bidirectional generation. In this case, a laser pumped with 75 mW power at 980 nm generates almost identical 790 and 570 fs soliton pulses with an average power of 1.17 and 1.11 mW. The operation stability and pulse quality of the soliton pulses in both unidirectional regimes are highly competitive with those generated in conventional ring fibre lasers with isolator in the cavity. Demonstrated bidirectional laser operation can find vital applications in gyroscopes or precision rotation sensing technologies.

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“…Passively mode-locked fiber lasers have been extensively investigated as an excellent ultrafast pulse source because of their compactness, alignment-free operation and excellent pulse stability [1][2][3][4][5][6][7][8][9]. Dissipative solitons (DSs) were recently observed in all-normal-dispersion fiber lasers [1][2][3], which become a good alternative to solid-state lasers as they favor larger pulse energy compared to the solitons formed in the anomalous-dispersion regime and the dispersion-managed regime [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…Conventionally, an isolator was used to ensure the unidirectional operation. With a high power pump, Zhao et al reported self-started mode-locking and soliton operation in a bidirectional fiber ring laser mode locked by the NPR technique [7]. It was shown that due to the cavity nonlinearity-induced directional symmetry breaking the laser always operated unidirectional after mode-locking.…”

Section: Introductionmentioning

confidence: 99%

Unidirectional dissipative soliton operation in an all-normal-dispersion Yb-doped fiber laser without an isolator

Shen

et al. 2015

Appl. Opt.

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We demonstrate self-started unidirectional dissipative soliton operation and noise-like pulse operation in an all-normal-dispersion bidirectional Yb-doped fiber laser mode-locked by nonlinear polarization rotation. The laser works unidirectionally once mode-locking is achieved due to the cavity directional nonlinearity asymmetry along with the nonlinear polarization rotation mode-locking mechanism.

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Self-started unidirectional operation of a fibre ring soliton laser without an isolator

Cited by 5 publications

References 8 publications

Rotation Active Sensors Based on Ultrafast Fibre Lasers

Rotation Active Sensors Based on Ultrafast Fibre Lasers

Isolator-free switchable uni- and bidirectional hybrid mode-locked erbium-doped fiber laser

Unidirectional dissipative soliton operation in an all-normal-dispersion Yb-doped fiber laser without an isolator

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