Modulation instability induced by cross-phase modulation in a dual-wavelength dispersion-managed soliton fiber ring laser

We report on the observation of modulation instability induced by cross-phase modulation in a dual-wavelength operation dispersion-managed soliton fiber ring laser with net negative cavity dispersion. The passively mode-locked operation is achieved by using nonlinear polarization rotation technique. A new type of dual-wavelength operation, where one is femtosecond pulse and the other is picosecond pulse operation, is obtained by properly rotating the polarization controllers. When the dual-wavelength pulses are simultaneously circulating in the laser ring cavity, a series of stable modulation sidebands appears in the picosecond pulse spectrum at longer wavelength with lower peak power due to modulation instability induced by cross-phase modulation between the two lasing wavelengths. Moreover, the intensities and wavelength shifts of the modulation sidebands can be tuned by varying the power of the femtosecond pulse or the lasing central wavelengths of the dual-wavelength pulses. The theoretical analysis of the modulation instability induced by cross-phase modulation in our fiber laser is also presented.Comment: 26 pages, 10 figure

Efficient and thermally enhanced frequency upconversion in Yb3+-sensitized Tm3+-doped silica-on-silicon buried waveguides excited at 1.064 mu m

Efficient and thermally enhanced frequency upconversion of cw infrared radiation at 1.064 mum into blue (480 nm), red (660 nm) and near-infrared (800 nm) light in integrated Tm3+/Nb3+-codoped phosphosilicate silica-on-silicon buried waveguides is reported. Thermally induced frequency upconversion enhancement is observed for the first time in Tm3+/Yb3+-codoped systems excited off-resonance at 1.064 mum. A times seven thermally induced upconversion efficiency enhancement was obtained when the waveguide's temperature was varied in the 20-120 degreesC range. The thermal effect is believed to be associated with a temperature dependent effective absorption cross-section for the Yb3+-sensitizer, which depends upon the phonon occupation number in the host matrix

Efficient Second-harmonic Generation In Praseodymium-doped Ga : La : S Glass For 1.3-μm Optical Fiber Amplifiers

Efficient second-harmonic generation in praseodymium-doped gallium-lanthanum-sulphide glasses for optical fiber amplifiers around 1.3 μm is experimentally investigated. The Pr 3+-doped Ga : La : S glass samples were pumped by Nd : YAG laser pulses at 1.319 μm and 1.064 μm and generated frequency doubled light at 660 nm and 532 nm, respectively, with conversion efficiencies as high as 0.02%. Frequency doubling in praseodymium-free Ga : La : S glass samples was also observed.86821823Kumta, P.N., Risbud, S.H., Rare-earth chalcogenides an emerging class of optical materials (1994) J. Mater. Sci., 29, pp. 1135-1158Hewak, D.W., Deol, R.S., Wang, J., Wylangowski, G., Medeiros Neto, J.A., Samson, B., Laming, R.I., Baro, M.D., Low-phonon-energy glasses for efficient 1.3 μm optical fiber amplifiers (1993) Elect. Lett., 29, pp. 237-238Hewak, D.W., Medeiros Neto, J.A., Samson, B., Brown, R.S., Jedrzejewski, K.P., Wang, J., Taylor, E., Payne, D.N., Quantum-efficiency of praseodymium doped Ga:La:S glass for 1.3 μm optical fiber amplifiers (1994) IEEE Photon. Technol. Lett., 6, pp. 609-612Medeiros Neto, J.A., Taylor, E.R., Samson, B.N., Wang, J., Hewak, D.W., Laming, R.I., Payne, D.N., Hanney, R., The application of Ga:La:S-based glass for optical amplification at 1.3 μm (1995) J. Non-Cryst. Sol., 184, pp. 292-296Hewak, D.W., Samson, B.N., Medeiros Neto, J.A., Laming, R.I., Payne, D.N., Emission at 1.3 μm from dysprosium-doped Ga:La:S glass (1994) Elect. Lett., 30, pp. 968-970Samson, B.N., Medeiros Neto, J.A., Laming, R.I., Hewak, D.W., Dysprosium doped Ga:La:S glass for an efficient optical fiber amplifier operating at 1.3 μm (1994) Electron. Lett., 30, pp. 1617-1619Flahaut, J., Guittard, M., Loireau-Lozach, A.M., Rare-earth sulphide and oxysulphide glasses (1979) Glass Technol., 24, pp. 149-156MacDonald, R.L., Lawandy, N.M., Optically encoded phase-matched second-harmonic generation in semiconductor-microcrystallite-doped glasses (1991) J. Opt. Soc. Amer. B, 8, pp. 1307-1317MacDonald, R.L., Lawandy, N.M., Efficient second-harmonic generation into the UV by using optically rncoded dilicate glasses (1993) Opt. Lett., 18, pp. 595-597Discroll, T.J., Lawandy, N.M., Optically encoded second-harmonic generation in bulk silica-based glasses (1994) J. Opt. Soc. Amer. B, 11, pp. 355-371Osterberg, U., Margulis, W., Dye laser pumped by Nd:YAG laser pulses frequency doubled in a glass optical fiber (1986) Opt. Lett., 11, pp. 516-518Osterberg, U., Margulis, W., Experimental studies on efficient doubling in glass optical fiber (1987) Opt. Lett., 12, pp. 57-59Stolen, R.H., Tom, H.W.K., Self-organized phase-matched harmonic generation in optical fibers (1987) Opt. Lett., 12, pp. 585-587Krol, D.M., Giovanni, D.J., Pleibel, W., Stolen, R.H., Observation of resonant enhancement of photoinduced second-harmonic generation in Tm-doped aluminosilicate glass fibers (1993) Opt. Lett., 18, pp. 1220-1222Thogersen, J., Mark, J., Third-harmonic generation in standard and erbium-doped fibers (1994) Opt. Commun., 110, pp. 435-444Hickmann, J.M., Gouveia, E.A., Gouveia-Neto, A.S., Dini, D.C., Celaschi, S., Two-photon-resonant photoinduced second-harmonic generation in Er 3+-doped germano-aluminosilicate optical fibers pumped at 1.319 μm (1994) Opt. Lett., 19, pp. 1726-1728Hickmann, J.M., Gouveia, E.A., Gouveia-Neto, A.S., Dini, D.C., Celaschi, S., Enhancement of third-harmonic blue-violet light at 440 nm by erbium ions in Er 3+-GeO 2-doped silica monomode optical fibers pumped at 1.319 μm (1995) Opt. Lett., 20, pp. 1692-169