All-polarization-maintaining dual-wavelength mode-locked fiber laser based on Sagnac loop filter

Li, Runmin; Shi, Haosen; Tian, Haochen; Li, Yuepeng; Liu, Bowen; Song, Yafei; Hu, Minglie

doi:10.1364/oe.26.028302

Cited by 86 publications

(31 citation statements)

References 33 publications

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“…(1) Furthermore, we increased the repetition rate by a factor of two compared to previously reported PM dual-color lasers system [25], which also helps to achieve a higher non-aliasing bandwidth (see Eq. 1).…”

Section: Introductionmentioning

confidence: 99%

Tunable dual-comb from an all-polarization-maintaining single-cavity dual-color Yb:fiber laser

Fellinger¹,

Mayer²,

Winkler³

et al. 2019

Opt. Express

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We demonstrate dual-comb generation from an all-polarization-maintaining dualcolor ytterbium (Yb) fiber laser. Two pulse trains with center wavelengths at 1030 nm and 1060 nm respectively are generated within the same laser cavity with a repetition rate around 77 MHz. Dual-color operation is induced using a tunable mechanical spectral filter, which cuts the gain spectrum into two spectral regions that can be independently mode-locked. Spectral overlap of the two pulse trains is achieved outside the laser cavity by amplifying the 1030-nm pulses and broadening them in a nonlinear fiber. Spatially overlapping the two arms on a simple photodiode then generates a down-converted radio frequency comb. The difference in repetition rates between the two pulse trains and hence the line spacing of the down-converted comb can easily be tuned in this setup. This feature allows for a flexible adjustment of the tradeoff between non-aliasing bandwidth vs. measurement time in spectroscopy applications. Furthermore, we show that by fine-tuning the center-wavelengths of the two pulse trains, we are able to shift the down-converted frequency comb along the radio-frequency axis. The usability of this dual-comb setup is demonstrated by measuring the transmission of two different etalons while the laser is completely free-running.

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Section: Introductionmentioning

confidence: 99%

Tunable dual-comb from an all-polarization-maintaining single-cavity dual-color Yb:fiber laser

Fellinger¹,

Mayer²,

Winkler³

et al. 2019

Opt. Express

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show abstract

“…This is several orders of magnitude lower compared to the absolute linewidth (coarsely estimated to be 3 MHz) and proves that the laser shows mutual coherence on time scales much greater than 1/Δf r , as required by computational correction. Such narrow free-running relative line widths have been previously reported only in dual-wavelength configurations [21][22][23][24][25] , and may suggest that the large repetition rate difference of several kilohertz is not necessary. Unfortunately, the opposite is true.…”

Section: Figmentioning

confidence: 60%

“…The burgeoning field of single-cavity dual-comb (SCDC) lasers is constantly being enriched with new concepts. To date, the most popular fiber-based SCDC generation mechanisms employ bidirectional mode-locking of a ring cavity [17][18][19][20] , dual-wavelength lasing [21][22][23][24][25] , and non-linear pulse shaping mechanisms 26 . Their full spectroscopic potential, however, has been weakly exploited to date.…”

Section: Introductionmentioning

confidence: 99%

Computational Doppler-limited dual-comb spectroscopy with a free-running all-fiber laser

et al. 2019

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Dual-comb spectroscopy has emerged as an indispensable analytical technique in applications that require high resolution and broadband coverage within short acquisition times. Its experimental realization, however, remains hampered by intricate experimental setups with large power consumption. Here, we demonstrate an ultra-simple free-running dual-comb spectrometer realized in a single all-fiber cavity suitable for the most demanding Dopplerlimited measurements. Our dual-comb laser utilizes just a few basic fiber components, allows to tailor the repetition rate difference, and requires only 350 mW of electrical power for sustained operation over a dozen of hours. As a demonstration, we measure low-pressure hydrogen cyanide within 1.7 THz bandwidth, and obtain better than 1% precision over a terahertz in 200 ms enabled by a drastically simplified all-computational phase correction algorithm. The combination of the unprecedented setup simplicity, comb tooth resolution and high spectroscopic precision paves the way for proliferation of frequency comb spectroscopy even outside the laboratory.

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“…THz-DCS systems and optical DCS systems. Recently, advances in the endeavor to generate a pair of frequency combs from a free-running single-cavity laser [22][23][24][25][26][27][28][29][30][31] have shown great potential towards this goal. By propagating through the same cavity, the dual optical combs experience almost the same disturbances, and the commonmode fluctuations thereby prevent the decline of the mutual coherence between the dual combs.…”

Section: Various Schemes Have Been Investigated To Further Reduce Thementioning

confidence: 99%

Combination of Adaptive Sampling Terahertz Dual-Comb Spectroscopy with a Free-Running Single-Cavity Dual-Comb Fiber Laser

Chen

Nitta

Zhao

et al. 2019

2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)

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Mode-resolved dual-comb spectroscopy (DCS) is an emerging spectroscopic tool with the potential to simultaneously achieve a broad spectral coverage and ultrahigh spectral resolution in terahertz (THz) spectroscopy. However, the need for two independently stabilized ultrafast lasers significantly hampers the potential application of DCS techniques. In this article, we demonstrate mode-resolved DCS in the THz region based on a free-running single-cavity dual-comb fiber laser with adaptive sampling. Low-pressure spectroscopy of acetonitrile gas with absorption features approaching the Doppler limit is demonstrated by comb-mode-resolved measurements with a spectral sampling spacing of 48.8 MHz, a spectral resolution of less than 5 MHz and a signal-to-noise ratio of ~50 dB. The successful demonstration of the proposed method clearly indicates the great potential for the realization of lowcomplexity, MHz-resolution THz spectroscopy instrumentation.

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All-polarization-maintaining dual-wavelength mode-locked fiber laser based on Sagnac loop filter

Cited by 86 publications

References 33 publications

Tunable dual-comb from an all-polarization-maintaining single-cavity dual-color Yb:fiber laser

Tunable dual-comb from an all-polarization-maintaining single-cavity dual-color Yb:fiber laser

Computational Doppler-limited dual-comb spectroscopy with a free-running all-fiber laser

Combination of Adaptive Sampling Terahertz Dual-Comb Spectroscopy with a Free-Running Single-Cavity Dual-Comb Fiber Laser

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