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Laser & Optoelectronics Progress, Volume. 55, Issue 6, 061408(2018)

Bandwidth of Push-Pull Modulated Distributed Feedback Lasers

Ning Zhou1、1; , Chengliang Zuo、2*; *; , Zekun Lin2、2; , Mingwen Lan2、2; , Zhixing Dong2、2; , Cheng Ke2、2; , and Junqiu Qi2、2;
Author Affiliations
  • 1 Accelink Technologies Co., Ltd., Wuhan, Hubei 430074, China
  • 2 Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (10)
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    References (13)
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    Figures & Tables(10)
    Schematic of a typical push-pull modulated DFB laser

    Fig. 1. Schematic of a typical push-pull modulated DFB laser

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    Small-signal intensity response of a typical push-pull modulated DFB laser

    Fig. 2. Small-signal intensity response of a typical push-pull modulated DFB laser

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    Coupling wave of the nth section at a certain time of t=kΔt

    Fig. 3. Coupling wave of the nth section at a certain time of t=kΔt

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    Small-signal response of 1st order grating push-pull modulated DFB laser versus (a) кL, (c) cavity length and (e) electrode ratio; small-signal response of 2nd order grating push-pull modulated DFB laser versus (b) кL, (d) cavity length and (f) electrode ratio

    Fig. 4. Small-signal response of 1st order grating push-pull modulated DFB laser versus (a) кL, (c) cavity length and (e) electrode ratio; small-signal response of 2nd order grating push-pull modulated DFB laser versus (b) кL, (d) cavity length and (f) electrode ratio

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    Small-signal intensity and phase response of (a) 1st order grating and (b) 2nd order grating push-pull modulated DFB lasers

    Fig. 5. Small-signal intensity and phase response of (a) 1st order grating and (b) 2nd order grating push-pull modulated DFB lasers

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    Small-signal intensity and phase response of (a) 1st order grating and (b) 2nd order grating single electrode DFB lasers

    Fig. 6. Small-signal intensity and phase response of (a) 1st order grating and (b) 2nd order grating single electrode DFB lasers

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    (a) 5 Gb/s and (b) 10 Gb/s eye patterns of the push-pull modulated DFB laser

    Fig. 7. (a) 5 Gb/s and (b) 10 Gb/s eye patterns of the push-pull modulated DFB laser

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    (a) 5 Gb/s and (b) 10 Gb/s eye patterns of single electrode DFB laser

    Fig. 8. (a) 5 Gb/s and (b) 10 Gb/s eye patterns of single electrode DFB laser

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    Spectrum of the push-pull modulated DFB laser

    Fig. 9. Spectrum of the push-pull modulated DFB laser

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    • Table 1. Parameters of push-pull modulated DFB laser

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      Table 1. Parameters of push-pull modulated DFB laser

      ParameterValue
      Active region thickness d /μm0.048
      Cleaved facet reflectivity rHR /%56.5
      Coated facet reflectivity rAR0
      Group velocity ng3.6
      Grating period of 1st/2ndorder grating Λ /nm240.84/481.64
      Constant gain coefficient g0 /cm-11800
      Effective index neff3.21
      Optical confinement factor Γ0.072
      Transparent carrier densityN0 /(1017 cm-3)8
      Line width enhancement factor αH2.0
      Non-linear gain saturation coefficientε /(10-17 cm-3)3
      SRH recombination coefficientA /(109 s-1)1
      Bimolecular radiation coefficientB /(1010 cm-3·s-1)2
      Auger coefficient C /(10-29 cm-6·s-1)4
      Spontaneous couplingcoefficient γ /10-55
      Model loss α /cm-115
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    Ning Zhou, Chengliang Zuo, Zekun Lin, Mingwen Lan, Zhixing Dong, Cheng Ke, Junqiu Qi. Bandwidth of Push-Pull Modulated Distributed Feedback Lasers[J]. Laser & Optoelectronics Progress, 2018, 55(6): 061408

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    Paper Information

    Category: Lasers and Laser Optics

    Received: Nov. 24, 2017

    Accepted: --

    Published Online: Sep. 11, 2018

    The Author Email: Zuo Chengliang ( zuochengliang@hust.edu.cn)

    DOI:10.3788/LOP55.061408

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology