Spectral dynamics of picosecond gain-switched pulses from nitride-based vertical-cavity surface-emitting lasers.

ABSTRACT: Short pulses generated from low-cost semiconductor lasers by a simple gain-switching technique have attracted enormous attention because of their potential usage in wide applications. Therein, reducing the durations of gain-switched pulses is a key technical point for promoting their applications. Therefore, understanding the dynamic characteristics of gain-switched pulses is highly desirable. Herein, we used streak camera to investigate the time- and spectral-resolved lasing characteristics of gain-switched pulses from optically pumped InGaN single-mode vertical-cavity surface-emitting lasers. We found that fast initial components with ultra-short durations far below our temporal resolution of 5.5 ps emerged on short-wavelength sides, while the entire pulses were down-chirped, resulting i

SUBMITTER: Chen S 

PROVIDER: S-EPMC3948090 | biostudies-literature | 2014 Mar

REPOSITORIES: biostudies-literature