ANALYSIS OF FM AND AM RESPONSES OF A TUNABLE 3-ELECTRODE DBR LASER-DIODE

Starting with the wave propagation equation, neglecting spatial and sp ectral hole-burning effects, and using a solving method based on the G reen's function, the rate equations are derived for a multielectrode l aser, By applying them to a three-electrode DBR laser, tunability and linewidth performance are evaluated, and the modulation characteristic s such as the amplitude response and the frequency response are analyz ed, It is shown that amplitude modulation can be completely suppressed , and at the same time, a pure frequency modulation obtained if curren ts are related by an adequate equation, Since this laser diode has man y advantages such as a wide wavelength tunability and a narrow spectra l linewidth, it will be suitable as a lightwave oscillator or transmit ter in future communication systems.