We demonstrate robust soliton crystals generation with a fixed frequency pump laser through thermoelectric-cooler-based thermal-tuning approach in butterfly-packaged complementary-metal-oxide-semiconductor-compatible microresonator. Varieties of crystal states, exhibiting "palm-like" optical spectra that result from the strong interactions between dense ensembles and reflect their temporal distribution directly, are experimentally observed by sweeping one cavity resonance across blue-detuned...

Abstract In this paper, we demonstrate a novel dual-pump approach to generate robust optical frequency comb with varying free spectral range (FSR) spacing in CMOS-compatible high-Q micro-ring resonator (MRR). The of the can be tuned by an integer number FSR MRR freely our scheme. dual pumps are self-oscillated laser cavity loop and their wavelengths flexibly programming tunable filter embedded cavity. By tuning pump wavelength, broadband OFC bandwidth >180 nm frequency-spacing from 6...

Zirconium carbide (ZrC), a novel representative of the MXene family, has attracted considerable interest because its outstanding physicochemical properties and potential applications in optoelectronic devices. For improving performance as an optical modulator for ultrashort lasers, there is call to continue studying nonlinear behavior ZrC. Herein, first time, ZrC films were fabricated on fused silica by magnetron sputtering deposition technology used saturable absorber (SA) passive...

We demonstrate an all polarization-maintaining (PM) fiber-based optical frequency comb and provide the detailed environmental stability analysis results. The has been built by commercial available PM fiber completely, its static uncertainty in domain is 350 Hz 1 s when referenced to a low noise oven controlled crystal oscillator. acoustic resonant frequencies of system have measured. It proved that acoustic-vibration induced phase could be eliminated pass vibration-isolation structure....

We design a low-timing-jitter, repetition-rate-tunable, stretched-pulse passively mode-locked fiber laser by using nonlinear amplifying loop mirror (NALM), semiconductor saturable absorber (SESAM), and tunable optical delay line in the configuration. Low-timing-jitter pulses are stably produced when SESAM 0.16 m dispersion compensation employed cavity. By inserting between NALM SESAM, variable repetition-rate operation of self-starting, is successfully demonstrated over range from 49.65 to...

A passively mode-locked Er-doped fiber laser with a fundamental repetition rate of 2.68 GHz is reported. The oscillator operating at central wavelength 1558.35 nm has compact, robust structure and low-noise performance. timing jitter integrated from 30 MHz down to 300 Hz 82.5 fs, the performance analyzed based on theory model. amplification compression high optical pulses are also investigated. After three-stage amplifier, average power boosted 430 mW. Meanwhile, nonlinear self-phase...

A passively mode-locked fiber laser with 1.03 GHz fundamental repetition rate and low noise performance is demonstrated.The compact robust operates at a central wavelength of 1553.9 nm 3 dB spectral bandwidth 7.9 temporal width 550 fs.All the fibers components used in are polarization-maintaining (PM), so output pulses linearly polarized.The degree polarization (DOP) optical measured to be 0.9994.The phase seventh harmonic (7.21 GHz) timing jitter 11.7 fs obtained by integrating from 30 MHz...

We present an all-fiber all-polarization-maintaining (PM) single mode (SM) fiber pulse nonlinear amplification system. The seed laser with a repetition rate of 200 MHz is amplified by two-section erbium-doped PM gain fibers different peak-absorption rate. duration can be compressed into 34-fs 320-mW output power, which corresponds to 1.6-nJ energy and approximate 23.5-kW peak power. In addition, the further coupled high octave-spanning supercontinuum generation obtained. To best our...

We demonstrate an L-band passively mode-locked femtosecond fiber laser with a fundamental repetition rate of 1.013 GHz based on semiconductor saturable absorber mirror. Compared other reported lasers that use overlong Er-doped fiber, the here consists 10 cm heavily doped to increase pulse gigahertz level. An output ratio as low 0.2% is used make central wavelength up 1.6 μm. The operates at soliton regime 3 dB spectral bandwidth 13.6 nm and duration 229 fs.

Based on the normalized spatiotemporal Lugiato-Lefever equation, evolutions of cosine-modulated stationary fields relating to generation single-free spectral range (FSR) or multi-FSR Kerr frequency combs in a microresonator with anomalous dispersion are studied numerically. The research results show that single-FSR comb arises when dissipative soliton pulse multiple nonequidistant pulses form cavity. Compared smooth and regular structure single pulse, corresponding uneven distribution...

An asynchronous optical sampling scheme based on four-wave mixing (FWM) in highly nonlinear fiber (HNLF) is experimentally demonstrated.Based this scheme, 10-GHz input pulse train with 1.8-ps width successfully sampled 100-m HNLF.A single at 10 GHz 2.3-ps rebuilt by using a 50-MHz frequency tunable free-running laser as the source (SPS).40-GHz used signal.The waveforms, together low-jitter eye diagram, are also presented.

Abstract This paper presents the design of a low‐timing‐jitter, stable picosecond optical‐pulse source, which is based on low‐cost, uncooled Fabry–Perot (FP) semiconductor laser in gain‐switching operation. The wavelength designed can be tuned from 1538 to 1554 nm under condition external continuous‐wave (CW) light injection. relationship between injection power and timing jitter or pulse width this gain‐switched studied experimentally. Our results show that optical pulses with widths about...

A narrow linewidth Ti:sapphire laser is developed and characterized for the generation of an ultraviolet nanosecond pulses planar laser-induced fluorescence (PLIF) imaging hydroxyl (OH). With a pump power 11.4 W at 1 kHz, produces 3.5 mJ 849 nm with pulse duration 17 ns achieves conversion efficiency 28.2%. Accordingly, its third-harmonic outputs 0.56 283 in BBO type I phase match. An OH PLIF system has been built; to 4 kHz fluorescent image propane Bunsen burner captured based on this system.

A novel scheme is proposed for ultrafast optical waveform samplers capable of operating over a wide wavelength range, which uses the four-wave mixing in highly nonlinear photonic crystal fiber (HNL-PCF) with low and very flat dispersion S, C L bands. We report first demonstration designed sampler by employing 20 m dispersion-flattened HNL-PCF observing 160 Gbit s−1 data signal to achieve temporal resolution less than 0.8 ps separation up 11 nm between sampling lights. This preliminary result...

We demonstrate a 200-MHz all polarization-maintaining, repetition-rate-locked femtosecond fiber laser system with total electrical power consumption of 11 W. The center wavelength, spectral width, pulse and average output the are 1558.8 nm, 34 139 fs, 77.6 mW, respectively. proposed that integrates optical components locking electronics has volume less than 1.5 L, mass 1.3 kg, fast time 3 s (from free running state to state). Using hydrogen maser as frequency reference, after locking, Allan...

Mid-infrared frequency comb spectroscopy enables measurement of molecular at megahertz spectral resolution, sub-hertz accuracy and microsecond acquisition speed. However, the widespread adoption this technique has been hindered by complexity alignment sensitivity mid-infrared sources. Leveraging underexplored window silica fibers presents a promising approach to address these challenges. In study, we present first experimental demonstration quantitative numerical description generation in...

Mid-infrared frequency-comb spectroscopy enables measurement of molecules at megahertz spectral resolution, sub-hertz frequency accuracy, and microsecond acquisition speed. However, the widespread adoption this technique has been hindered by complexity alignment sensitivity mid-infrared sources. Leveraging underexplored window silica fibers presents a promising approach to address these challenges. In study, we present first, best our knowledge, experimental demonstration quantitative...

Perfect linkage of dual frequency combs based on all polarization-maintaining femtosecond fiber lasers is demonstrated. By employing two independent tracking feedback controlling circuits, the repetition ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$f_{r}$ </tex-math></inline-formula> ) and carrier-envelope offset notation="LaTeX">$f_{ceo}$ slave comb track master’s , respectively. The correlation...

The miniaturized femtosecond laser in near infrared-II region is the core equipment of three-photon microscopy. In this paper, we design a compact and robust illumination source that emits dual-color linearly polarized light for Based on an all-polarization-maintaining passive mode-locked fiber laser, shift center wavelength pulses to 1.7[Formula: see text][Formula: text]m band utilizing cascade Raman effect, thereby generate dual-wavelength pulses. To enhance clarity, two wavelengths are...

We present the design of highly stable, passively mode-locked fiber lasers which are based on a simple configuration and require low pump power for generation optical pulses with subpicosecond pulsewidth. Our designed laser uses semiconductor saturable absorber mirror to realize self-starting, passive mode locking at 29 mW, stable pulse train is obtained fundamental repetition rate 52.5 MHz central wavelength 1557 nm. The output have pulsewidth 881 fs an average 1.78 respectively.

We experimentally investigate the noise properties of a homemade 586 MHz mode-locked laser (MLL). The variation timing jitter versus harmonic order is measured, which consistent with theoretical analyses. dominant contributions to are detailedly studied by analyzing phase noises at different frequencies. For low-order harmonics, intensity and relative-intensity-noise-coupled (RIN-coupled) mainly contribute jitter, while for high-order amplified spontaneous emission (ASE) makes contribution....

A spectro-temporal filtering method is proposed to increase the contrast ratio of chirped pulses. The advantages this include easy cascading, high transmission, and it can also be used in high-energy pulse amplifier (CPA) system. effectiveness was experimentally verified by operating on a Ti:sapphire CPA system then measuring based optical Kerr gate effect(OKG). result demonstrated that, after passing through one-stage with transmittance up 70%, improved an order magnitude.