A new MOSFET IC laser-driver with on-chip thermal and optical stabilization

This paper presents a new more advantageous configuration for the laser dio de that is used as the principle light source in optical fiber communicatio ns and a range of other applications. Most of the common drawbacks have bee n eradicated through the new design which is integrated through the well kn own floating gate MOSFET technology. Advantages including improved thermal and optical stabilization and easy direct modulation are realized from a ne w on-chip laser driver. Besides, the technique guarantees compensation for device leakage and device to device tolerances. The resulting device is che aper and easy to construct. The voltage control provides better output power modulation and improve lin earity for high output power levels. The threshold current required to stim ulate emission is also reduced to similar to 10(3) A/cm(2) at 300 K with an active region thickness of similar to 0.5 mu m. In fact the proposed desig n provides a thinner well defined active region (0.3 mu m) which also acts as an optical cavity resonator, besides satisfying the conditions for the c onfinement of charged carriers and optical fields.