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Optical Engineering

Discretely tunable single-longitudinal-mode fiber laser stabilized to the channel of the ITU-T grid
Author(s): Han Young Ryu; Won-Kyu Lee; Ho-Suhng Suh
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Paper Abstract

We propose a fiber ring laser that operates in a single longitudinal mode by incorporating unpumped erbium-doped fiber as a saturable absorber filter. This laser can be discretely tuned to a 25-GHz-spacing grid that precisely matches ITU-T (International Telecommunication Union, Telecommunication Standardization Sector) grids, which are reference frequencies for optical communication systems. This laser has a signal-to-source spontaneous emission ratio higher than 60 dB, and the lasing frequencies of 361 channels are matched to ITU-T grids with excellent power flatness. With one channel of this fiber laser, we place the reference frequency near the absolute frequency reference (AFR, 193.1 THz). The relative frequency stability of the laser and the frequency offset from the AFR were less than 1.6×10-8 (integrated time, 5 min) and 30 MHz, respectively.

Paper Details

Date Published: 1 January 2008
PDF: 5 pages
Opt. Eng. 47(1) 015004 doi: 10.1117/1.2835693
Published in: Optical Engineering Volume 47, Issue 1
Show Author Affiliations
Han Young Ryu, Korea Research Institute of Standards and Science (South Korea)
Won-Kyu Lee, Korea Research Institute of Standards and Science (South Korea)
Ho-Suhng Suh, Korea Research Institute of Standards and Science (South Korea)

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