Review on photonic method for generating optical triangular pulses

doi:10.1007/s12200-013-0315-0

Front Optoelec

2013, Vol. 6

Issue (2) : 127-133 https://doi.org/10.1007/s12200-013-0315-0

REVIEW ARTICLE

Review on photonic method for generating optical triangular pulses

Yiqun WANG¹, Li PEI²(

), Song GAO¹, Jun HAO¹, Sijun WENG¹

1. Key Lab of All Optical Network and Advanced Telecommunication Network of EMC, Beijing Jiaotong University, Beijing 100044, China; 2. Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China

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Abstract

In this paper, several photonic generating methods for optical triangular pulses were reviewed. Four frontier research methods for generating optical triangular pulses were introduced, these four methods are respectively based on the frequency-to-time conversion, using normally dispersive fiber, by single-stage dual-drive Mach-Zehnder modulator (MZM), and using dual-parallel MZM. These four methods can be classified into two categories in terms of the optical source employed, such as mode-lock laser (MLL) and continuous-wave (CW) respectively. Compared with the methods based on MLL, those based on CW have many advantages, such as simpler structure, lower price, higher stability, more flexible and wider tunability. Besides, the method using single-stage drive MZM can generate versatile waveform optical pulses, which has better performance than the first two methods in tunable capability of both repetition rate and center wavelength. With the same driving signal applied, the optical source using the dual-parallel MZM can generate signal with higher frequency than that of using the single-stage MZM.

Keywords triangular pulses Mach-Zehnder modulator (MZM) mode-lock laser (MLL) continuous-wave (CW)

Corresponding Author(s): PEI Li,Email:lipei@bjtu.edu.cn

Issue Date: 05 June 2013

Cite this article:

Yiqun WANG,Li PEI,Song GAO, et al. Review on photonic method for generating optical triangular pulses[J]. Front Optoelec, 2013, 6(2): 127-133.

URL:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-013-0315-0
https://academic.hep.com.cn/foe/EN/Y2013/V6/I2/127

Fig.1 Flow chart of the triangular-shaped pulse generation (MLL, mode-locked laser; MOD, modulator; DE, dispersive element; PD, photo-detector)

Fig.2 Schematic diagram of the spectrum shaper (PC, polarization controller; PMF, polarization maintaining fiber; BTOF, band-width-tunable optical filter)

Fig.3 Experimental set-up for triangular-shaped pulses generation (MLFL, mode-locked fiber laser; PPG, pulse pattern generator ; MOD, modulator; EDFA, erbium-doped fiber amplifier; ND fiber, normally dispersive fiber)

Fig.4 Experimental setup using single-stage dual-drive MZM for waveform generation (RF, radio frequency; CW, continuous-wave; MZM, Mach-Zehnder modulator; EDFA, erbium-doped fiber amplifier; SMF, single-mode fiber)

Fig.5 Schematic set-up using a dual-parallel MZM for the triangular-shaped pulses (TL, tunable laser; LO, local oscillator; FT, frequency tripler; EA, electrical amplifier; PS, phase-shift; DP-MZM, dual-parallel Mach-Zehnder modulator; EDFA, erbium-doped fiber amplifier)

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