Stable and uniform dual-wavelength erbium-doped fiber laser based on fiber Bragg gratings and photonic crystal fiber

Institute for Infocomm Research, Tumasik, 00, Singapore
Optics Express (Impact Factor: 3.49). 02/2005; 13(1):142-7. DOI: 10.1364/OPEX.13.000142
Source: PubMed


Based on fiber Bragg gratings (FBGs) and high nonlinear photonic crystal fiber (HN-PCF), a novel dual-wavelength erbium-doped fiber (EDF) laser is proposed and demonstrated. Experimental results show that, owing to the contributions of two degenerate four-wave mixings in the HN-PCF, the proposed fiber laser is quite stable and two output signals are uniform at room temperature. With adjustment of the attenuator, our fiber laser can selectively realize one wavelength lasing. (C) 2005 Optical Society of America.

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    • "The channel spacing is 0.184 nm, which is defined by the MKR. By using fourwave mixing (FWM) process [27]–[29], the mode competition of erbium-doped fiber could be effectively suppressed. Taking advantage of spectral filtering effect, we could flexibly tune the lasing location of multiwavelength operation by simply rotating the PC. "
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    ABSTRACT: We proposed and demonstrated a stable multiwavelength erbium-doped fiber laser by using a microfiber knot resonator (MKR)-based comb filter. By properly rotating the polarization controller, up to 11 lasing lines in a 3-dB bandwidth with 0.184-nm channel spacing were obtained. In addition, the lasing locations can be flexibly tuned by virtue of spectral filtering effect induced by the polarization-dependent isolator and the intracavity birefringence. The results demonstrated that the MKR could be employed as a high performance comb filter to realize a compact multiwavelength fiber laser.
    IEEE Photonics Technology Letters 07/2014; 26(14):1387-1390. DOI:10.1109/LPT.2014.2324618 · 2.11 Impact Factor
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    • "Although there will be slight wavelength shifts for each experiments , achieving the lasing spacing of around 3 pm can be reproduced with certain effort. The DWFL also achieves a high signal to noise ratio (SNR) of more than 60 dB, similar to that as reported in [13]. The high SNR is basically contributed by two main factors; the first is the function of the TBPF in the ring cavity. "
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    ABSTRACT: By controlling the polarization state of a simple ring erbium-doped fiber laser with photonics crystal fiber, polarization controller (PC) and tunable band-pass filter, this paper demonstrates stable operation of narrow spacing dual-wavelength fiber laser (DWFL). The flexibility of the tunable band-pass filter and PC allows the spacing tuning of the DWFL from 80 pm up to 600 pm. Such tuning ability offers flexibility in the application of DWFL, particularly in tunable microwave generation and radio over fiber. Throughout the experiment, the DWFL shows high power stability within 0.6 dB and wavelength shift of less than 10 pm. In addition to that, it also produces a narrow linewidth optical output of 3 pm with a high signal to noise ratio of more than 60 dB.
    IEEE Photonics Journal 12/2013; 5(6):1502706-1502706. DOI:10.1109/JPHOT.2013.2293613 · 2.21 Impact Factor
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    • "Fiber-based lasers offer several advantages over bulk solid-state lasers, such as better reliability, lower cost and higher efficiency [1] [2] [3] [4]. They can emit ultranarrowbandwidth waves [5] or ultrashort pulses [6]. "
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    ABSTRACT: We have experimentally investigated nonuniformly polarized broadband high-energy pulses delivered from a mode-locked laser with an ultra-long erbium-doped fiber (EDF). The pulses exhibit a broadband spectrum of ~73 nm and can avoid optical wave breaking at high-pump regimes. The polarization states of the pulses evolve from uniform to nonuniform at each round trip in the oscillator, which is distinct from other pulses. Remarkably, the output pulses broaden in anomalous- or normal-dispersion regimes while they can be shortened with an EDF amplifier external to the cavity. Our results suggest that the long EDF results in a nonuniform-polarization state and plays a decisive role in the formation of high-energy pulses.
    Laser Physics 01/2013; 23(3):035104. DOI:10.1088/1054-660X/23/3/035104 · 1.03 Impact Factor
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