2014
DOI: 10.1088/1054-660x/24/8/085111
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A tuneable, power efficient and narrow single longitudinal mode fibre ring laser using an inline dual-taper fibre Mach–Zehnder filter

Abstract: A tuneable single longitudinal mode fibre ring laser with dual-taper fibre filter is proposed and experimentally demonstrated in this paper. The single longitudinal mode operation, and power limitations for a Mach-Zehnder interferometer filter generated from a single mode fibre, are verified for the first time. Incorporating an in-line taper fibre Mach-Zehnder interferometer filter inside the laser ring cavity causes a spatial mode beating interference, resulting in a passive narrow band filter with the abilit… Show more

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Cited by 13 publications
(9 citation statements)
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“…The use of wavelength filters for side mode suppression has been a well explored method. For instance, H. Ahmad and co‐workers used a Mach‐Zehnder comb filter based on a pair of abrupt tapers and demonstrate the feasibility of side mode suppression to the point where the laser was operating in a single‐longitudinal mode . The fact that abrupt and thin tapers are used implies that the insertion loss of the device is large, and the device is fragile and extremely sensitive to external perturbations.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…The use of wavelength filters for side mode suppression has been a well explored method. For instance, H. Ahmad and co‐workers used a Mach‐Zehnder comb filter based on a pair of abrupt tapers and demonstrate the feasibility of side mode suppression to the point where the laser was operating in a single‐longitudinal mode . The fact that abrupt and thin tapers are used implies that the insertion loss of the device is large, and the device is fragile and extremely sensitive to external perturbations.…”
Section: Discussionmentioning
confidence: 99%
“…On the other hand, wavelength filters have been used in EDFL ring cavities to suppress side modes and favors single‐longitudinal mode operation. Fiber Bragg gratings , Fabry‐Perot , Mach‐Zehnder , and others, have been used for the same purpose. Also, it is well known that the length of the erbium‐doped fiber determine directly the lasing wavelength in a free‐running cavity.…”
Section: Introductionmentioning
confidence: 99%
“…Two areas, each with a length of ∼1 cm, were tapered to the core level and are labeled taper 1 and taper 2. These two sections have the same features as a multimode fiber, due to the large difference between the core and air-refractive index [14]. The average peak-to-peak beating distance, or wavelength spacing Δλ, is the main characteristics of the microfiber MZI.…”
Section: Methodsmentioning
confidence: 99%
“…Most of the research in dual wavelength lasers within the last decade has utilized a gain medium of erbium-doped fiber (EDF), which results in emitted wavelengths of 1550 nm. Various proposals for dual wavelength laser generation exploiting EDF, including polarization hole burning [4], the use of fiber Bragg gratings (FBG) [5] and introduction of a filter [6,7], are readily available in literature. However, there are far less reports on dual wavelength laser generation in the 1 µm region using ytterbium-doped fiber (YDF) as the gain medium [8][10], which is the interest of this paper.…”
Section: Introductionmentioning
confidence: 99%