Title :
A Widely Tunable Directly Modulated DBR Laser With High Linearity
Author :
Liqiang Yu ; Huitao Wang ; Dan Lu ; Song Liang ; Can Zhang ; Biwei Pan ; Limeng Zhang ; Lingjuan Zhao
Author_Institution :
Key Lab. of Semicond. Mater. Sci., Inst. of Semicond., Beijing, China
Abstract :
We demonstrate a widely tunable and high-modulation-bandwidth distributed Bragg reflector (DBR) laser. With the selected butt-joint material (λg = 1.44 μm) and butt-joint angle (45°) for the grating section, a widely tuning range of 13.88 nm with 19 consecutive channels is obtained for the two-section DBR laser. Furthermore, a small-signal modulation bandwidth of 16 GHz with in-band flatness of ±3 dB is realized at 10 °C. A uniform modulation bandwidth of more than 13 GHz is obtained for ten consecutive channels at 25 °C. Meanwhile, the DBR laser shows a high linearity, with an input 1-dB compression point of 17 dBm and an input third-order intercept point of 30 dBm at 13 GHz.
Keywords :
diffraction gratings; distributed Bragg reflector lasers; laser tuning; optical communication equipment; optical modulation; passive optical networks; semiconductor lasers; bandwidth 13 GHz; bandwidth 16 GHz; compression point; directly modulated DBR laser; distributed Bragg reflector laser; high linearity; laser tuning; small-signal modulation bandwidth; temperature 25 degC; third-order intercept point; Bandwidth; Distributed Bragg reflectors; Gain; Laser tuning; Materials; Modulation; Directly-modulated; Distributed Bragg reflector (DBR) lasers; Passive optical networks (PONs);
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2014.2331247
