Wavelength-switchable fiber ring laser using chirped Moiré fiber grating combined with Sagnac loop interferometer
نویسندگان
چکیده
A simple, cost-effective and switchable five-wavelength fiber ring laser based on a chirped moiré fiber grating (CMFG) and a wavelengthtunable Sagnac loop interferometer (FSI) filter is proposed and experimentally demonstrated. To serve as wavelength selective element, the CMFG possesses excellent comb-like filtering characteristics, and its fabrication method is easy and flexible. The usage of the FSI filter helps remove the high-cost optical circulator and improve the output performance of optical signal-to-noise ratio. Streszczenie. Zaproponowano i przedstawiono eksperymentalnie prosty, tani światłowodowy laser żyroskopwy z przełączanymi pięcioma długościami fali. Zastosowano siatkę dyfrakcyjną z efektem mory ze skomprymowanego włókna (CMFG) oraz, w pętli strojenia, filtr z interferometrem z pętlą Signac’a (FSI). Wykorzystana jako element selektywny, ustalający długość fali, siatka CMFG zapewnia doskonałą, grzebieniową charakterystykę filtru, ponadto metoda jej wytwarzania jest łatwa i elastyczna. Wykorzystanie filtru FSI pomaga obniżyć koszt układu i zapewnia na wyjściu dobry stosunek sygnał/szum. Światłowodowy laser żyroskopowy z przełączaną długością fali wykorzystujący siatkę dyfrakcyjną z efektem mory ze skomprymowanego włókna w połączeniu z interferometrem z pętlą Signac’a.
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