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For the first time, we report femtosecond pulses from a passive single-section InAs/InP quantum-dot (QD) mode-locked laser (MLL) with active length of 456 µm and ridge width 2.5 at C-band wavelength range.Without any external pulse compression, transformlimited Gaussian-pulses are generated 92 GHz repetition rate 312 fs duration, which is shortest directly electricpumping semiconductor MLLs to our best knowledge.The lasing threshold injection current differential quantum efficiency 17.2 mA...

We report on the generation of dual-wavelength self-mode-locking pulses from an InP-based quantum dot laser. The demonstrated device operates simultaneously at both 1543.7 and 1571.7 nm has a repetition rate 92.5 GHz. pulse width is below 960 fs, average power coupled to cleaved single-mode fiber nearly 9 mW current bias 60 mA.

We have used an external cavity self-injection feedback locking (SIFL) system to simultaneously reduce the optical linewidth of over 39 individual wavelength channels InAs/InP quantum dot (QD) coherent comb laser (CCL). Linewidth reduction from a few MHz less than 200 kHz is observed. Measured phase noise spectra clearly indicate significant decrease in frequency range above 2 kHz. The RF beating signal between two adjacent also shows substantial 3-dB 10 300 Hz with SIFL system, and...

We report on the design, growth, and fabrication of InAs/InP quantum dash (QD) gain materials their use in lasers for optical network applications. A noise performance comparison between QD well (QW) Fabry-Perot (F-P) has been made. By using material we have successfully developed assembled C-band coherent comb laser (CCL) modules with an electrical fast feedback loop control system to ensure a targeted mode frequency spacing. The spacing was maintained within ±100 ppm operation wavelengths...

We have developed an InAs/InP quantum dot (QD) C-band coherent comb laser (CCL) module with actively stabilized absolute wavelength and power, channel spacing of 34.462 GHz ± 100 ppm accuracy.The total output power is up to 46 mW.The integrated average relative intensity noise (RIN) values the lasing spectrum a filtered single at 1540.19 nm were -165.6 dB/Hz -130.3 respectively in frequency range from 10 MHz GHz.The optical linewidth 45 individual channels between 1531.77nm 1543.77nm ranged...

This paper presents an InAs/InP quantum dash (QD) C-band passively mode-locked laser (MLL) with a channel spacing of 34.224 GHz. By using this QD-MLL we demonstrate aggregate 5.376 Tbit/s PAM-4 data transmission capacity both for back-to-back (B2B) and over 25-km standard single mode fiber (SSMF). represents the first demonstration acting as error-free operation at some filtered individual channels. finding highlights viability QD lasers to be used low-cost optical source center networks.

We have developed and experimentally demonstrated a highly coherent low noise InP-based InAs quantum dash (QDash) buried heterostructure (BH) C-band passively mode-locked laser (MLL) with pulse repetition rate of 25 GHz for fiber-wireless integrated fronthaul 5G new radio (NR) systems. The device features broadband spectrum providing over 46 equally spaced optical channels an phase relative intensity (RIN) frequency range 10 MHz to 20 each individual channel typically less than 466.5 kHz...

We demonstrate real-time broadband multi-Gb/s electrical RF synthesizer-free millimeter-wave (MMW) signals generation and wireless transmission at the 5G new radio (NR) frequency band of 47 GHz based on analog radio-over-fiber (A-RoF) fronthaul. This is enabled by a low noise, highly correlated, monolithic C-band semiconductor InAs/InP quantum-dash (QDash) dual-wavelength distributed feedback (DW-DFB) laser. One laser mode encoded using 4-/6-GBaud multilevel quadrature amplitude modulation...

The mode-locking and noise characteristics of InP/InAs quantum dash (QDash) dot (QDot) multi-wavelength lasers, showing identical structural design, operating at the <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">C</i> -band, are investigated compared to each other. QDash lasers exhibit improved repetition frequency stability with a lower threshold current cavity loss. On other hand, QDot show higher quality tunability internal efficiency,...

Semiconductor monolithic mode-locked lasers (MLLs) are potential solutions for generating high-speed optical pulses in future mobile fronthaul networks the millimeter-wave (mmW) bands. Our previous studies have investigated using buried heterostructure (BH) quantum dash (QDash) multi-wavelength photonic mmW applications. Here we present results from chip-scale ridge waveguide QDash MLLs and transmitting signals. Through optimizing epitaxy growth, design, fabrication process, five-layer MLL...

We have developed and experimentally demonstrated a novel monolithic InAs/InP quantum-dash dual-wavelength distributed feedback (QD DW-DFB) C-band laser as compact optical beat source to generate millimeter-wave (MMW) signals. The device uses common gain medium in single cavity structure for simultaneous correlated stable dual-mode lasing the 1550-nm wavelength range. A record narrow linewidth down 15.83 kHz average relative intensity noise (RIN) low -158.3 dB/Hz from 10 MHz 20 GHz are two...

A passive InAs/InP quantum dot (QD) semiconductor mode-locked laser (MLL) emitting 403-GHz repetition rate pulses with 268- and 563-fs pulse durations is demonstrated experimentally around 1.54 μm. The QD MLL consists of a Fabry-Pérot external cavities that include eight fiber Bragg gratings (FBGs). mode-locking realized by four-wave mixing in the waveguide between longitudinal modes selected FBGs.

A short pulse train with pulsewidth was generated in a quantum dot mode-locked laser (QD MLL). Due to the dispersion length, it is required include group-velocity (GVD) modeling generation and evolution from QD MLLs. On other hand, Kerr effect also consider due high peak power density cavity, its induced self-phase modulation (SPM) contributes evolution. In this paper, time domain traveling wave model, including of GVD SPM, combined rate equations, established model single-section MLL. It...

This paper presents a micromechanical clamped–clamped beam (CC-beam) displacement amplifier based on CMOS-MEMS fabrication process platform. In particular, 2.0 MHz resonant composed of two identical CC-beams coupled by mechanical at locations where the beams have mismatched velocities exhibits larger displacement, up to 9.96×, one than that other. The amplification prevents unwanted input impacting—the structure switches only output but not input—required switch-based circuits (Kim et al...

We compare the timing jitter of a mode-locked InAs/InP quantum dash (QD) coherent comb laser (CCL) with and without an external cavity self-injection feedback locking (SIFL) system.The is determined through measurement first harmonic RF power spectrum output detected using fast photodiode.A significant reduction in observed SIFL.A pulse to root-mean-square time 1.56 fs achieved for SIFL.This low promising light source next generation high-speed networking systems all-optical signal...

A multiwavelength laser with maximum signal-to-noise ratio up to 62 dB was demonstrated on the basis of a 461-m-long InAs-InGaAsP quantum-dot waveguide Fabry-Perot cavity chip. It has 24 channels 0.8-nm channel spacing and 8.0-dB intensity nonuniformity over wavelength range from 1612 1632 nm. Its irregularity due linear intracavity dispersion also investigated.

We demonstrate a reconfigurable microwave photonic (MWP) filter using quantum dash (QDash) mode-locked laser (MLL) that can generate an optical frequency comb (OFC) with ∼50 lines and free spectral range of 25 GHz. Thanks to the large number lines, MWP responses be easily programmed by tailoring OFC spectrum. implement Gaussian, sinc, flat-top, multiple peaks, as well tuning central frequency. achieve minimum 3 dB bandwidth ∼100 MHz for sinc-shaped filter, while maximum out-of-band rejection...

The determination of timing jitter obtained from optical phase noise measurements is investigated in InAs/InP quantum dash Fabry-Pérot mode-locked coherent comb lasers with different pulse repetition rates. results are compared those determined through a direct measurement the first harmonic RF power spectrum. Very good agreement achieved. ability to measure not restricted by rate laser being studied, allowing it be applied extremely high lasers. Using these we demonstrate 5.4 Tbit/s (PAM-4...

The exact time dependence of the density operator and various physical quantities for motion-quantized Jaynes-Cummings models (MQJCMs) is given using transformation under which it shown that MQJCMs have same dynamics as ordinary JCMs in Kerr medium. quantum collapses revivals atomic motion due to properties light fields quantization position momentum, are predicted. effects initial momentum distribution arbitrary intensity-dependent medium on collapse revival phenomena population inversion,...

We have developed an external cavity self-injection feedback locking (SIFL) system to simultaneously reduce optical linewidth of each individual channel InAs/InP qantum dot (QD) 34.46-GHz coherent comb laser (CCL). Optical linewidths are reduced from a few MHz down less than 300 kHz over 47 filtered channels, varying 5.3% 9.1% the original linewidth, between 1531.60 nm 1544.20 nm. By using this ultra-narrow QD CCL we demonstrated 12.032 Tbit/s (16QAM 47x32 GBaud PDM) back data bandwidth...

We investigate the capabilities and limitations of quantum-dash mode-locked lasers (QD-MLLDs) as optical frequency comb sources in coherent communication systems. demonstrate that QD-MLLDs are on par with conventional single-wavelength narrow linewidth laser can support high symbol rates modulation formats. manage to transmit 64 quadrature amplitude (QAM) signals up 80 GBd over km standard single-mode fiber (SSMF), which highlights distinctive phase noise performance QD-MLLD. Using a 38.5...