Multigigahertz Bandwidth FM Response of Frequency Tunable Two-Electrode DFB Lasers

A. E. Willner, M. Kuznetsov, I. P. Kaminow, U. Koren, T. L. Koch, C. A. Burrus, G. Raybon

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


We have characterized the FM response of frequency- tunable two-electrode DFB lasers operating at 1.35 µm. Under certain bias conditions, an FM response of ~ 1 GHz/mA is flat over a range of modulating frequencies from 10 kHz to several hundred megahertz. This region is followed by a shallow dip and a high-frequency relaxation resonance peak, allowing an overall 3 dB FM bandwidth of ~5 GHz. We believe this to be the widest FM bandwidth reported to date for such lasers; however, variations of the phase of the FM response could limit the useful bandwidth in an FSK system. The experimental response is a function of static tuning conditions, with significant differences between regions of red and blue frequency shift with increasing current. The observed behavior is well represented by theoretical curves derived from a small-signal analysis.

Original languageEnglish (US)
Pages (from-to)360-363
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number11
StatePublished - Nov 1989

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


Dive into the research topics of 'Multigigahertz Bandwidth FM Response of Frequency Tunable Two-Electrode DFB Lasers'. Together they form a unique fingerprint.

Cite this