Abstract
The frequency modulation (FM) due to injection current modulation of vapor phase transported distributed feedback (VPT DFB) semiconductor lasers is measured as a function of modulation frequency from 10 kHz to 1 GHz. A large frequency modulation response of 350 MHz/mA is obtained for the modulation frequency range of 10 to 1000 MHz. Demodulation of optical frequency shift keying (FSK) at 560 Mb/s is demonstrated, indicating that frequency modulation due to thermal modulation does not pose a significant limitation at this bit rate or higher. The large FM response together with modulation bandwidths up to 8 GHz makes the VPT DFB laser an attractive source for high bit rate optical FSK transmission.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 966-968 |
| Number of pages | 3 |
| Journal | Applied Physics Letters |
| Volume | 48 |
| Issue number | 15 |
| DOIs | |
| State | Published - 1986 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)