Single-frequency 1.7-μm Tm-doped fiber laser with optical bistability of both power and longitudinal mode behavior

Zhang, Junxiang; Sheng, Quan; Zhang, Lu; Shi, Chaodu; Sun, Shuai; Bai, Xiaolei; Shi, Wei; Yao, Jianquan

doi:10.1364/oe.424336

Cited by 28 publications

(10 citation statements)

References 28 publications

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“…Therefore, we used a 20% pilot overhead in the carrier recovery to remove the cycle slips. The pilot overhead could be significantly reduced if a carrier recovery algorithm with high tolerance to phase noise is used 38 , 39 or a narrow-linewidth laser is utilized for the 1.74-μm-band pump 40 . We have investigated the use of low-density parity-check (LDPC) code overheads of 20%, 25% and 33%.…”

Section: Resultsmentioning

confidence: 99%

Super-broadband on-chip continuous spectral translation unlocking coherent optical communications beyond conventional telecom bands

et al. 2022

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Today’s optical communication systems are fast approaching their capacity limits in the conventional telecom bands. Opening up new wavelength bands is becoming an appealing solution to the capacity crunch. However, this ordinarily requires the development of optical transceivers for any new wavelength band, which is time-consuming and expensive. Here, we present an on-chip continuous spectral translation method that leverages existing commercial transceivers to unlock the vast and currently unused potential new wavelength bands. The spectral translators are continuous-wave laser pumped aluminum gallium arsenide on insulator (AlGaAsOI) nanowaveguides that provide a continuous conversion bandwidth over an octave. We demonstrate coherent transmission in the 2-μm band using well-developed conventional C-band transmitters and coherent receivers, as an example of the potential of the spectral translators that could also unlock communications at other wavelength bands. We demonstrate 318.25-Gbit s−1 Nyquist wavelength-division multiplexed coherent transmission over a 1.15-km hollow-core fibre using this approach. Our demonstration paves the way for transmitting, detecting, and processing signals at wavelength bands beyond the capability of today’s devices.

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Section: Resultsmentioning

confidence: 99%

Super-broadband on-chip continuous spectral translation unlocking coherent optical communications beyond conventional telecom bands

et al. 2022

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“…Another frequency selection method in ring cavity is using rare earth ions-doped fiber as saturable absorber, which is simple, robust and can effectively suppress the mode instability. By using the Tm 3+ -doped fiber as the saturable absorber, our team has demonstrated a 1720 nm single-frequency fiber ring laser with a maximum single-frequency output power of 400 mW [57]. The power scaling was limited by the high laser threshold, which is resulted from the strong absorption of Tm 3+ -doped fiber at 1.7 μm.…”

Section: Wavelength Extensionmentioning

confidence: 99%

Recent progress of high-power single-frequency all-fiber oscillators and amplifiers

Shi¹,

Fu²,

Li³

et al. 2023

Fiber Lasers XX: Technology and Systems

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High-power single-frequency fiber lasers have attracted great attention in the applications of high-resolution spectroscopy, long-distance coherent communication, gravitational wave detection and some other areas, due to the advantage on narrow linewidth, low noise and so on. In this paper, we systematically summarize the recent achievements of high-power singlefrequency fiber laser oscillators and amplifiers as well as performance improvement on noise suppression, linewidth narrowing, and wavelength extension. Besides, the next development of SFFLs has been prospected.

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“…[ 23 ] In our previous work, unpumped thulium‐doped fibers have been used as SAs to achieve SLM operation at 1720 nm. [ 24 ] In that work, we found that the oscillator exhibited strong optical bistability and the laser threshold changed significantly with the SA fiber length. Indeed, in the case where the SA fiber length was 0.75 m, the laser threshold exceeded 6 W and the laser output was the multilongitudinal mode (MLM).…”

Section: Introductionmentioning

confidence: 96%

2.56 W Single‐Frequency All‐Fiber Oscillator at 1720 nm

Zhang

Sheng

Zhang

et al. 2021

Advanced Photonics Research

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The saturable absorption effect of unpumped, rare earth‐doped fiber can be used as a method of achieving single‐frequency operation in fiber lasers. This effect in thulium‐doped fiber is used to achieve single‐frequency operation from an all‐fiber oscillator centered at 1720 nm. The characteristics of the saturable absorption effect are carefully studied and numerous operating regimes are identified wherein the oscillating state and frequency output characteristics of the laser can be manipulated via the injection of auxiliary pump light to the saturable absorber. A record single‐frequency output power of 2.56 W at 1720 nm is obtained; the slope efficiency is 44% and the laser linewidth is 3.3 kHz. The power scaling of the laser is only limited by the available power of the single‐mode 1570 nm pump source. Herein, new insights into methods of generating high‐power, single‐frequency emission from all‐fiber oscillators are offered.

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Single-frequency 1.7-μm Tm-doped fiber laser with optical bistability of both power and longitudinal mode behavior

Cited by 28 publications

References 28 publications

Super-broadband on-chip continuous spectral translation unlocking coherent optical communications beyond conventional telecom bands

Super-broadband on-chip continuous spectral translation unlocking coherent optical communications beyond conventional telecom bands

Recent progress of high-power single-frequency all-fiber oscillators and amplifiers

2.56 W Single‐Frequency All‐Fiber Oscillator at 1720 nm

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