R and inductance L of the laser discharge for every time instant. Combining these relationships for four adjacent time instants we can determine the values of R and L for the time period covering the four adjacent time instants. Scanning the entire time region of the laser discharge the time histories of the resistance R and inductance L of the laser discharge are revealed. These are shown in Fig. 3. The time dependence of these electric quantities (R, L) shows strong variations in the formation phase of the discharge (first 4511s). The resistance R (Fig. 3) of the laser discharge drops exponentially from a very high value to a low value. This is attributed to electron avalanche multiplication during the formation phase.
We demonstrate the mode locking of external-cavity semiconductor lasers by using a saturable Bragg reflector as an external reflector. Output pulses of 1.9 ps were generated from the semiconductor lasers without dispersion compensation. By coupling the output to a standard single-mode filter with a length of 35 m to compensate for the linear chirp, we have achieved mode-locked pulse durations as short as 880 fs.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.