A theoretical model of multielectrode DBR lasers

Abstract

Abstract-A theoretical model for two-and three-section tunable DBR lasers is presented. The static tuning properties are studied in terms of threshold current, linewidth, oscillation frequency, and output power. Regions of continuous tuning are presented for three-section DBR lasers. We discuss different routes for continuous tuning, when the injection currents to the passive sections are varied, and the limitations on the continuous tuning range are clarified. By proper control of these currents a tuning range of approximately 400 GHz is predicted at 1.55 pm wavelength, which is in good agreement with the experimental results published thus far.

Effects of 946-nm thermal shift and broadening on Nd 3+ :YAG laser performance

“…Xing and Bergquist made considerable effort on the shifts of four-level system transition lines from Stark sublevels R 1 and R 2 in 4 F 3/2 to Y n (n is from 1 to 6) in the 4 I 9/2 intermanifold level. [18] Similar work was also reported by Sato and Taira. [19] Temperature dependencies of stimulated emission cross section, linewidth, lineshift of twelve emission peaks of four-level system emission lines for Nd:YAG, Nd:YVO 4 , and Nd:GdVO 4 were evaluated.…”

High-power sub-kHz linewidth lasers fully integrated on silicon

“…Operating the E-DBR near a mode hop can result in multimode, chaotic, or self-pulsing behavior [41,42]. To study these mode hops in more detail, the power to the phase control section was tuned (up and down) at a fixed gain current of 200 mA, while monitoring the lasing wavelength and peak power at that wavelength using a Yokogawa AQ6150 wave meter.…”

Analysis, Selection and Control of Optimal Driving Current Combinations in Wavelength Switching for DBR Lasers

“…Although it has many studies covering the methodologies of how to maintain wavelength stability in optic fiber communication system [2], it will be more effective by reducing the subsequent procedures in the wavelength stability operation if we can improve the output wavelength stability of the laser source; consequently we need a tunable laser with accurate and stable wavelength [3]. From technique point of view the Distributed Feed-back (DFB) Laser and Distributed Bragg Reflector (DBR) laser are the most matured laser fabrication processes [4][5][6][7]. It uses thermal modulation method to tune the laser bandwidth in DFB laser and because it has longer modulation time and shorter tunable bandwidth range; it usually makes DBR laser as the selected laser source for optic fiber communication system.…”