Optical frequency domain ranging by a frequency-shifted feedback laser

Koichiro Nakamura, Takefumi Hara, Masato Yoshida, Toshiharu Miyahara, Hiromasa Ito

Research output: Contribution to journalArticlepeer-review

87 Citations (Scopus)


This paper describes the theoretical and experimental study of a new technique for optical frequency domain ranging (OFDR) by a frequency-shifted feedback (FSF) laser. In conventional OFDR, a frequency-chirped single-mode laser is used as a light source to convert a distance into a beat frequency, and a tradeoff exists between measurement range and resolution. The FSF laser output consists of periodically generated chirped frequency components whose chirp rate is faster than 100 PHz/s (P = 1015). By use of the FSF laser, the tradeoff is removed and long-distance high-resolution OFDR is realized. In the experiment, a distance of 18.5 km was measured with a resolution of 20 mm.

Original languageEnglish
Pages (from-to)305-316
Number of pages12
JournalIEEE Journal of Quantum Electronics
Issue number3
Publication statusPublished - 2000 Mar

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


Dive into the research topics of 'Optical frequency domain ranging by a frequency-shifted feedback laser'. Together they form a unique fingerprint.

Cite this