We propose and demonstrate a novel dynamically tunable fiber-based Lyot filter for the realization of dual-wavelength mode-locked fiber laser, operating at center wavelengths 1535 nm 1564 nm. The same laser cavity can also be operated in single-wavelength regime with wavelength tuning range 30 nm, from 1532 to 1562 proposed Lyot-filter provides simple setup mode-locking using single design generate pulses, flexibility allow generation pulses continuously-tunable wavelength.

Wavelength tunable mode-locked fiber lasers have highly potential applications in precision spectroscopy, nonlinear microscopy and photonic sensing. Here, we present a compact thermal-sensitive reflective Lyot filter utilize it for all-polarization-maintaining efficiently wavelength-tunable Er-doped carbon-nanotube-mode-locked laser the first time, to best of our knowledge. The output wavelength can be tuned from 1544.46 nm 1572.71 nm, with wide tuning range 28.25 remarkable efficiency 0.589...

For the first time, to best of our knowledge, in soliton regime, we demonstrate an L-band fiber laser mode-locked by all polarization-maintaining (all-PM) nonlinear polarization rotation (NPR). A numerical study suggests that lengthening NPR section boosts modulation depth and lowers saturation power artificial saturable absorber (SA). With longest date (21 m), emits 1.25-ps pulses at 1584.2 nm a 3.9-MHz repetition rate. Our provides promising seed source, exhibiting improved repeatability...

Abstract We demonstrate a 783 MHz fundamental repetition rate mode-locked Er-doped all-fiber ring laser with pulse width of 623 fs. By using carbon nanotubes saturable absorber, relatively low self-starting pump threshold 108 mW is achieved. The has very compact footprint less than 10 cm × cm, benefiting from the all-active-fiber cavity design. robust mode-locking confirmed by relative intensity noise and long-term stability test. propose new scheme for generating high femtosecond optical...

We present for the first time, to best of our knowledge, pump-power-controlled, all-polarization-maintaining (all-PM), all-fiber configured, wavelength-tunable mode-locked fiber laser in L-band (1565 1625 nm). A tuning range over 20 nm (1568.2 1588.9 nm) is attained simply by varying pump power between 45 and 115 mW. Our work represents demonstration wavelength all-PM configured nonlinear polarization evolution (NPE) lasers. The non-mechanical electrically controllable method offers ease use...

Nonreciprocity of traditional filters severely limits their tunability. To tap alternatives, here we propose hybrid wavelength manipulation with enhanced ambient-thermal-drift adaptability in an all-polarization-maintaining fiber laser. A multifunctional 2-in-1 device, which is based on a CNTs-coated tapered panda and specially designed PMMA (polymethyl methacrylate) package, fabricated applied to induce nonlinear saturable absorption spectral filtering. In particular, tuning enabled by the...

Mode-locked fiber lasers with wavelength tunability and dual-wavelength mode-locking capability have wide applications in nonlinear imaging, precision metrology photonic sensing. Here, for the first time, we propose experimentally demonstrate an environmentally stable all-polarization-maintaining (all-PM) mode-locked laser without any intracavity filter attenuator, whose is switchable injected pump power. By increasing power, switches from 1560-nm band to 1560/1530-nm mode-locking, finally...

Dispersion-tuned swept lasers (DTSLs) can sweep the lasing wavelength widely at high speed without need for any filter and have good potential sensing applications, such as swept-source optical coherence tomography (SS-OCT). Properties of DTSLs, tuning range, speed, spectral linewidth, etc., are determined by several parameters, amount dispersion, cavity length, modulation frequency depth, nonlinearity. Two models been suggested to analyze design which both only valid steady states sweep....

We optimized parameters of a dispersion-tuned wavelength-swept fiber laser by numerically analyzing dynamic characteristics. The is experimentally demonstrated and applied to the swept-source optical coherence tomography (SS-OCT) system. (DT-WSL) unique tunable laser, whose lasing wavelength can be tuned rapidly without any mechanical filters. Although DT-WSL swept widely, broadening instantaneous spectral width at high sweep rate has been critical drawback for SS-OCT applications. Numerical...

A laser mode-locking phenomenon based on polarization-dependent loss (PDL) using a passive fiber coil is demonstrated. We propose operating in low-V-number regime to achieve an enhanced bend-induced PDL and maintain reasonable bend loss. mode-locked thulium doped all-fiber shown the coil. The results indicate that moderate amount of at 1 dB sufficient initiate sustain stable CW operation. To best our knowledge, this first demonstration enabled by

In this paper, we report our results on the use of patterned graphene SiN waveguides inside an erbium doped fiber ring laser cavity for passive mode locking. We confirm dominant influence over non-linear polarization rotation (NPR), arising from polarizing to chip grating couplers, by observing limits NPR in high loss lasers. fabricated waveguides, transferred and three different lengths, observed types pulses based length graphene, pump power state cavity. confirmed success processing...

We propose and demonstrate an overall non-mechanical spectrally steered laser rangefinder using the dispersion-tuned swept (DTSL) a passive diffractive element. The DTSL has no mechanical moving parts, making it possible to achieve inertial-free high wavelength sweeping speed. inherent intensity-modulation characteristic of allows modulation phase-shift method be applied, similar that used for amplitude-modulated continuous-wave (AMCW) rangefinder. Since pulse repetition rate is chirped,...

The dispersion-tuned swept laser (DTSL) is a wavelength-swept source, which can achieve fast sweep without using any mechanical tunable filter. Such sources are highly suitable for swept-source optical coherent tomography (SS-OCT). DTSL-based SS-OCT (DTSL-OCT) deliver very imaging speed, however, it suffers from limited depth due to the its coherence length. In this article, digital detection techniques applied DTSL-OCT improve and axial resolution. We show that two phase-uncertainty-induced...

We propose a new truly all-PM dual-comb fiber laser using CNT-SA. demonstrated stable polarization-multiplexed mode-locked operation by compensating the PDL. The repetition frequency difference between two outputs was 413 Hz.

We propose a novel nonreciprocal polarization isolator for the realization an all-PM dual-comb fiber laser. An orthogonally-polarized bi-directional output has been demonstrated, first time, with 5.474 kHz repetition frequency difference at 20 MHz.

We demonstrate a 783-MHz fundamental repetition rate mode-locked Er-doped all-fiber ring laser with pulse width of 623 fs. By using carbon nanotubes (CNT) saturable absorber (SA), relatively low self-starting pump threshold 108 mW is achieved. The has very compact footprint less than 10 cm * cm, benefiting from the all-active-fiber cavity design. robust mode-locking confirmed by relative intensity noise (RIN) and long-term stability test. propose new scheme for generating high femtosecond...

For the first time, we introduce a rapid wavelength-swept, passively mode-locked fiber laser in an all-polarization-maintaining and all-fiber configuration. Achieving exceptional wavelength sweep rate of up to 19 kHz through external modulation LD driver pump current, this offers high rate, simple cavity design, cost-effectiveness, excellent repeatability.

For the first time, we introduce a rapid wavelength-swept L-band tunable mode-locked fiber laser, boasting an exceptional wavelength sweeping rate of up to 19 kHz, enabled by external modulation pump current.

For the first time, we present pump power-controlled wavelength-tunable mode-locked fiber laser in L-band (1565 nm to 1625 nm), achieved by all-polarization maintaining (all-PM) nonlinear polarization rotation (NPR). The wavelength of can be tuned over 20 nm, from 1568.2 1588.9 simply controlling power 45 mW 115 mW. In contrast conventional tuning mechanisms such as optical bandpass filters, our method is non-mechanical and electrically controllable, featuring simplicity cost-effectiveness a...

We achieved the first demonstration of a wavelength-tunable mode-locked fiber laser in L-band using all-Polarization-Maintaining (all-PM) Nonlinear Polarization Rotation (NPR). The all-PM configured features excellent repeatability and reliability. By increasing pump power from 82.5 mW to 135 mW, center wavelength-tuning 1576.2 nm 1592.2 is obtained. This non-mechanical tuning mechanism opens new possibilities for lasers their applications.

Repetition-rate-scanned lasers are practical in accordion frequency comb generation that serves as a variable gearbox connecting optical and radio wave domains. Rapid wide-range scanned repetition rate can benefit versatile purposes, however scanning robustness remains unsecured typically requires complicated feedback loops. Recently, multiplexed have been demonstrated with the nature of common-noise rejection among simultaneously emitted combs. Here, we propose bidirectional...

The threshold pump power for modelocking decreased by 18% when the temperature was increased from 25 to 100 degrees C, where a SWCNT/PDMS coated tapered fiber used as saturable absorber in laser. Further, at which multi-pulse operation began 24%, and range over fundamental could be maintained 59% same range. This decrease stability is attributed large thermo-optic coefficient of PDMS polymer, results 40% reduction overlap between evanescent field SWCNT coating taper 75 C.

We realize 783-MHz fundamental repetition rate in a carbon-nanotubes (CNT) mode-locked Er-doped fiber ring laser with all active fibers. The proposed self-starts mode-locking at 108-mW pump power and delivers 623-fs pulses directly.

We demonstrate a bidirectional polarization-multiplexed fiber laser and explore its potentials towards self-referenced dual-comb generation with tunable repetition rates. Regardless of ambient temperature fluctuations, the absolute deviation frequencies’ difference is within 0.52 Hz.