Experimental demonstration of modulation bandwidth enhancement in distributed feedback lasers with external light injection

Abstract

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.

Overcoming laser diode nonlinearity issues in multi-channel radio-over-fiber systems

“…As was mentioned previously, most of the work in this area to date has been on the laser alone [5][6][7][8]11,12]. There has been no work reported which simulates the full communication system in which external injection is used to linearise the modulation response of the directly modulated laser.…”

“…conditions the relaxation frequency of the laser may be increased significantly [5][6][7][8][9][10][11][12], and the modulation response at lower frequencies can be made significantly more linear than that without external injection [5,13]. This helps to greatly reduce IMD problems.…”

Bit error rates of flip-flop operations with AND gate functionality using a 1.55-µm polarization bistable VCSEL

“…Multiple peaks were observed when the data and set pulses were injected. They are considered to represent the relaxation oscillation of the VCSEL output [12,13,14,15]. …”

Radio-Over-Fiber Transport Systems Based on DFB Ld With Main and -1 Side Modes Injection-Locked Technique

“…In this paper, a fullduplex ROF transport system based on DFB LD with main and −1 side modes injection-locked technique is proposed and demonstrated. Previous study has verified that slave laser can be enhanced with better performance as injection-locked by master laser [6]. −1 side mode injection-locked technique, which can greatly enhance the resonance frequency of DFB LD, is expected to have good performance in fullduplex ROF transport systems [7,8].…”