Abstract
We propose a novel transmitter consisting of a frequency-modulated widely tunable super-structure-grating distributed Bragg reflector (SSG-DBR) laser and an optical filter. The SSG-DBR laser acts as a frequency modulating light source with a constant output power by modulating the reverse bias voltage in the phase control (PC) region. By optically filtering the output light from the frequency-modulated laser, we have demonstrated 60-and 180-km transmissions for 20-and 10-Gb/s nonreturn-to-zero (NRZ) signals, respectively. The power penalty was 2.2 dB after the 180-km transmission of a 10-Gb/s NRZ signal as determined by bit-error-rate measurements. Furthermore, an extended transmission reach was achieved with a wide tuning range without controlling the bias and modulating voltages in the PC region.
| Original language | English |
|---|---|
| Pages (from-to) | 294-296 |
| Number of pages | 3 |
| Journal | IEEE Photonics Technology Letters |
| Volume | 20 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2008 Feb 15 |
| Externally published | Yes |
Keywords
- Directly modulated laser
- Frequency-modulated laser
- Optical filter
- Optical minimum-shift keying (OMSK)
- Super-structure grating (SSG)
- Widely tunable laser
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering