Optics Express
Analytical formulation of directly modulated OOFDM signals transmitted over an IM/DD dispersive link
Mon, 2013-03-25 02:00 — GuestC. Sánchez, B. Ortega, J. L. Wei, J. Tang, J. Capmany
We provide an analytical study on the propagation effects of a directly modulated OOFDM signal through a dispersive fiber and subsequent photo-detection. The analysis includes the effects of the laser operation point and the interplay between chromatic dispersion and laser chirp. The final ... [Opt. Express 21, 7651-7666 (2013)]
Experimental evidence for the formation of divalent ytterbium in the photodarkening process of Yb-doped fiber lasers
Mon, 2013-03-25 02:00 — GuestS. Rydberg, M. Engholm
In this work we present experimental evidence that the valence instability of the ytterbium ion play a key role for the observed photodarkening mechanism in Yb-doped fiber lasers. Luminescence and excitation spectroscopy performed on UV irradiated Yb/Al doped silica glass preforms and near-infrared ... [Opt. Express 21, 6681-6688 (2013)]
Toward an ultra-broadband emission source based on the Bismuth and Erbium co-doped optical fiber and a single 830nm laser diode pump
Mon, 2013-03-25 02:00 — GuestJianzhong Zhang, Zinat M. Sathi, Yanhua Luo, John Canning, Gang-Ding Peng
We demonstrate a broadband optical emission from Bi/Er co-doped fiber and a single 830nm laser diode pump. The ultra-broadband mechanism is studied and discussed in details based on a combination of experimental measurements, including luminescence, differential luminescence and ESA, on fiber ... [Opt. Express 21, 7786-7792 (2013)]
Tunable CW all-fiber optical parametric oscillator operating below 1 μm
Mon, 2013-03-25 02:00 — GuestEkaterina A. Zlobina, Sergey I. Kablukov, Sergey A. Babin
CW all-fiber optical parametric oscillator (FOPO) with tuning range from 950 to 1010 nm is demonstrated using birefringent photonic crystal fiber pumped by an Ytterbium-doped fiber laser (YDFL) near 1 μm. CW parametric generation with spectral linewidth of 3.7 nm at 972 nm has been obtained ... [Opt. Express 21, 6777-6782 (2013)]
Black silicon: substrate for laser 3D micro/nano-polymerization
Mon, 2013-03-25 02:00 — GuestAlbertas Žukauskas, Mangirdas Malinauskas, Arūnas Kadys, Gediminas Gervinskas, Gediminas Seniutinas, Sasikaran Kandasamy, Saulius Juodkazis
We demonstrate that black silicon (b-Si) made by dry plasma etching is a promising substrate for laser three-dimensional (3D) micro/nano-polymerization. High aspect ratio Si-needles, working as sacrificial support structures, have flexibility required to relax interface stresses between substrate ... [Opt. Express 21, 6901-6909 (2013)]
Cryogenic, high power, near diffraction limited, Yb:YAG slab laser
Mon, 2013-03-25 02:00 — GuestMiftar Ganija, David Ottaway, Peter Veitch, Jesper Munch
A cryogenic slab laser that is suitable for scaling to high power, while taking full advantage of the improved thermo-optical and thermo-mechanical properties of Yb:YAG at cryogenic temperatures is described. The laser uses a conduction cooled, end pumped, zigzag slab geometry resulting in a near ... [Opt. Express 21, 6973-6978 (2013)]
Simultaneous hyperspectral differential-CARS, TPF and SHG microscopy with a single 5 fs Ti:Sa laser
Mon, 2013-03-25 02:00 — GuestIestyn Pope, Wolfgang Langbein, Peter Watson, Paola Borri
We have developed a multimodal multiphoton laser-scanning microscope for cell imaging featuring simultaneous acquisition of differential Coherent Antistokes Raman Scattering (D-CARS), two-photon fluorescence (TPF) and second harmonic generation (SHG) using a single 5 fs Ti:Sa broadband ... [Opt. Express 21, 7096-7106 (2013)]
A high efficiency architecture for cascaded Raman fiber lasers
Mon, 2013-03-25 02:00 — GuestV. R. Supradeepa, Jeffrey W. Nichsolson, Clifford E. Headley, Man F. Yan, Bera Palsdottir, Dan Jakobsen
We demonstrate a new high efficiency architecture for cascaded Raman fiber lasers based on a single pass cascaded amplifier configuration. Conversion is seeded at all intermediate Stokes wavelengths using a multi-wavelength seed source. A lower power Raman laser based on the conventional cascaded ... [Opt. Express 21, 7148-7155 (2013)]
Wavelength switchable high-power diode-side-pumped rod Tm:YAG Laser around 2µm
Mon, 2013-03-25 02:00 — GuestCaili Wang, Shifeng Du, Yanxiong Niu, Zhichao Wang, Chao Zhang, Qi Bian, Chuan Guo, Jialin Xu, Yong Bo, Qinjun Peng, Dafu Cui, Jingyuan Zhang, Wenqiang Lei, Zuyan Xu
We report a high-power diode-side-pumped rod Tm:YAG laser operated at either 2.07 or 2.02 µm depending on the transmission of pumped output coupler. The laser yields 115W of continuous-wave output power at 2.07 µm with 5% output coupling, which is the highest output power for all ... [Opt. Express 21, 7156-7161 (2013)]
Investigation of a planar optical waveguide in 2D PPLN using Helium implantation technique
Mon, 2013-03-25 02:00 — GuestQ. Ripault, M. W. Lee, F. Mériche, T. Touam, B. Courtois, E. Ntsoenzok, L.-H. Peng, A. Fischer, A. Boudrioua
In this work, we report the investigation of a planar waveguide in a 2D periodically-poled lithium niobate (PPLN). The waveguide is fabricated by helium (He^+) implantation at 2 MeV and a fluence of 1.5 x 10^16 ions/cm^2. Second harmonic generation (SHG) at 532 nm using a Q-switched laser and a CW ... [Opt. Express 21, 7202-7208 (2013)]
