Observation of acetylene molecular absorption line with tunable, single-frequency, and mode-hop-free erbium-doped fiber ring laser

• Published in: IEEE journal of quantum electronics 2002-10, Vol.38 (10), p.1325-1330
• Main Authors: Inaba, H., Onae, A., Akimoto, Y., Kornukai, T., Nakazawa, M.
• Format: Article
• Language: English
• Subjects: Absorption; Acetylene; Atomic and molecular physics; Biological and medical applications; Bragg gratings; Efficiency, stability, gain, and other operational parameters; Erbium-doped fiber lasers; Exact sciences and technology; Fabry-Perot; Fibers; Filters; Fundamental areas of phenomenology (including applications); Holes; Laser modes; Laser optical systems: design and operation; Laser tuning; Lasers; Linear approximation; Metrological applications; Molecular properties and interactions with photons; Molecular spectra; Narrowband; Optics; Physics; Ring lasers; Tunable circuits and devices; Tuning; Wavelengths
• ISSN: 0018-9197; 1558-1713
• DOI: 10.1109/JQE.2002.802959

We succeeded in observing one of the absorption lines of acetylene [P(16)] using an erbium-doped fiber-ring laser, which is the first such observation using a fiber-ring laser. The observed linewidth of the P(16) linear absorption was approximately 450 MHz. Mode competition and mode hopping were suppressed by using an ultra narrow-band fiber Bragg grating and a Fabry-Perot filter in the ring laser, respectively. Wavelength fine-tuning was carried out by changing the cavity length of the fiber-ring laser; the fine-tuning range was about 850 MHz (0.01 nm). Furthermore, wavelength tuning was achieved by controlling the temperature of the fiber Bragg grating, and the coarse timing range was about 0.2 mn.