Wangkuen Lee

TL;DR: In this article, the use of optical frequency combs generated from semiconductors for ultrawideband signal processing and communication applications is discussed, which can be used for communication applications relying on direct detection, dense wavelength division multiplexing (WDM), coherent-detection WDM, optical time-division multiple access, and optical code division multiple access.

TL;DR: In this paper, an external cavity curved two-section mode-locked diode laser system based on quantum-dot (QD) gain media near 1.3μm was investigated.

TL;DR: In this article, an external-cavity actively mode-locked ring laser with less than 7.5fs residual timing jitter (1Hz to 10MHz) for a 12.8GHz ring laser was obtained.

TL;DR: In this article, the general features and characteristics of two different external-cavity mode-locked semiconductor lasers (MSLs) were studied, and the experimental results have shown that the phase-coherent optical frequency combs and short pulses from the synchronized MSLs are very promising optical sources for many future coherent photonic systems, especially for spectrally phase-encoded optical code-division multiple access (SPE-OCDMA).

TL;DR: The experimental results have confirmed that the coherent detection processes in CPD and MCCD are nearly the same based on a square-root LO power dependence, Nevertheless, the MccD scheme has shown an advantage in a path-length error over the CPD scheme, revealing 2~3 dB improvement in sensitivities.