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  • Generation of high order multi-bound solitons and propagation in optical fibers

    • Authors: Nguyen, Duc Nhan; Le, Nguyen Binh (2009)

  • We demonstrate experimental generation of multi-bound solitons of up to sextuple in an active FM Received 16 October 2008 mode-locked fiber ring laser operating under power saturation in the locking state. The ring laser consists Received in revised form 27 February 2009 of two booster optical amplifiers operating in saturation regime, an electro-optic phase modulator driven Accepted 27 February 2009 by a sinusoidal electrical wave and a length of dispersive fiber. The periodic phase modulation generates phase chirp of the generated lightwaves in the ring laser. The chirped phase state plays an important role ...
  • Article

  • Generation of bound solitons in actively phase modulation

    • Authors: Nguyen, Duc Nhan; L.N. Binh (2008)

  • Abstract Bound solitons generated in actively mode-locked lasers enable new forms of pulse pairs and multiple pairs or groups of solitons in optical transmission or logics. In this paper, we present the generation of stable bound states of multiple solitons in an active mode-locked fiber laser using continuous phase modulation for wideband phase matching. Not only that dual-soliton bound states but also the triple- and quadruple-soliton pulses can be established. Simulation of the generated solitons are demonstrated. We have also prove by simulation that experimental relative phase difference and chirping caused by phase modulation of LiNbO3 modulator in the fiber loop significantly influences the interaction between the soli...
  • Article

  • Simulink model and FPGA-based OFDM communication system: a simulation and hardware integrated platform

    • Authors: Le, Khoa Dang; Nguyen, Huu Phuong; Nguyen, Duc Nhan; Le, Nguyen Binh (2010)

  • Ultra-broadband networks are currently attracting significant interests in employing wireless access and optical fiber access to the home and to the building at symbol rate reaching Gb/s. OFDM is a multicarrier modulation technique and considered to offer significant reduction of the data symbol to be carried per carrier channel, especially in ultra-high speed optical communications with bit rate reaching 100 Gb/s or even higher. This paper thus presents a novel and generic OFDM system employing both MATLAB Simulink and FPGA-based development software platform for simulation as well as hard- ware implementation for the generation and detection of OFDM signals for wireless and optical communica...