Wei-Wei Hsiang

Laser Dynamics of a 10 GHz 0.55 ps Asynchronously Harmonic Modelocked Er-Doped Fiber Soliton Laser

Laser dynamics of a 10 GHz 0.55 ps asynchronously harmonic modelocked Er-doped fiber soliton laser are investigated both theoretically and experimentally. Theoretical analyses based on the master equation model solved by the variational method have indicated that all the pulse parameters of the laser output will exhibit complicated slow periodic variations in the asynchronous soliton modelocking (ASM) mode. New experimental methods based on analyzing directly the RF spectra of the ASM laser output have been developed to accurately determine the sinusoidal variation of the pulse timing and the pulse center wavelength for the first time. It is found that the pulse center wavelength variation can be as large as 1 nm half-peak-to-peak and the pulse timing variation can be as large as 3 ps. The consistency among all the experimental data and theoretical prediction is carefully examined and the results indicate that the ASM pulse dynamics observed experimentally are in good agreement with those obtained from the theoretical analyses.

Fiber Dispersion Measurement With a Swept-Wavelength Pulse Light Source

A new fiber dispersion measurement method by utilizing a periodically swept-wavelength pulse light source is proposed and demonstrated. The periodic pulse timing variation of the pulse train induced by wavelength sweeping can be directly detected by a radio-frequency spectrum analyzer. Experiments by using an asynchronous mode-locked fiber soliton laser as the swept-wavelength pulse source have been successfully carried out to demonstrate the feasibility.

Asynchronous Harmonic Mode Locking in an All-Normal Dispersion Yb-Doped Fiber Laser

We present detailed experimental and theoretical results to demonstrate the possibility of asynchronous harmonic mode locking in an all-normal dispersion fiber laser. In contrast to asynchronous soliton mode-locking operation in the anomalous dispersion regime, more profound laser dynamics are found. The experimentally demonstrated 10-GHz asynchronous harmonic mode-locked Yb-doped fiber laser exhibits an excellent super-mode noise suppression ratio in the RF spectrum with picosecond output pulsewidth.

A simple group velocity dispersion measurement method by RF spectral periodic pulse timing variation characterization

By measuring the dispersion-induced periodic pulse timing variation with a wavelength-swept pulse light source and a RF spectrum analyzer, the fiber group velocity dispersion can be determined with excellent accuracy.

Passively synchronized two-color polarization additive pulse mode-locked fiber lasers

Passive synchronization and polarization additive pulse mode-locking techniques are combined to generate simultaneously the 1.03 mum and 1.53 mum ultrashort pulses at the same pulse repetition rates from synchronized Yb-fiber and Er-fiber mode-locked lasers.

Sub-fs hybrid synchronization between mode-locked fiber lasers

Sub-fs timing synchronization between a 1030nm Yb-doped and a 1560nm Er-doped mode-locked fiber laser is successfully demonstrated by utilizing a hybrid passive/active approach. The physical mechanisms for determining the relative timing jitter are clarified.

A new dispersioin measurement apparatus by a periodic wavelengh-scanning pulse laser

A new fiber group velocity dispersion (GVD) measurement method has been reported and demonstrated by using a periodic wavelength-scanning pulse laser such as an asynchronously modelocked Er-fiber soliton laser and simple RF spectral measurement.

Laser dynamics of asynchronously modelocked fiber soliton lasers

Laser dynamics of asynchronously modelocked Er-fiber soliton lasers is investigated theoretically and experimentally. The pulse parameters are found to exhibit complicated slow periodic variations and can be examined experimentally by analyzing the RF spectra.