A tunable and switchable single-longitudinal-mode dual-wavelength fiber laser incorporating a reconfigurable dual-pass Mach–Zehnder interferometer and its application in microwave generation

Wang, Fei; Xu, Enming; Dong, Jianji; Zhang, Chi

doi:10.1016/j.optcom.2011.01.005

Cited by 33 publications

(25 citation statements)

References 8 publications

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“…When the light from the two cores of TCF converges at the rightsplice point and then interference effect occurs due to different refractive indices of dual cores. So, the beam of light from SMF is coupled to the two cores of the TCF on average [12], we set the values of the power splitting ratio s 1 and s 2 both at 0.5 theoretically. The reflectivity spectra of theory and experiment are shown in Fig.…”

Section: Theoretical Analysis and Experimental Resultsmentioning

confidence: 99%

“…In order to obtain these properties, wavelength selective filters are very important components which can reduce the mode competition and suppress the mode hopping in the lasers cavity for EDFL. Until now, the main two kinds of optical filters have been proposed to achieve dual-wavelength EDFL [5][6][7][8][9][10][11][12], namely narrow band filters and comb filters. The narrow band filters are usually composed of the fiber Bragg gratings (FBGs) [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…However, the FBG fabrication needs expensive equipments including the phase masks and UV laser [9]. Correspondingly, the comb filters, such as the dual-pass Mach-Zehnder interference filter [10][11][12], high-birefringence fiber-based Sagnac loop filters [13][14][15], and the twin-core fiber filter [16,17], are also introduced into ring cavity fiber laser. These comb filters produce a continuous comb of channels with uniform channel spacing and nearly the same transmissivity.…”

Section: Introductionmentioning

confidence: 99%

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A dual-pass Mach–Zehnder interferometer filter using a TCF loop mirror for double-wavelength fiber lasers

Zou

Lou

et al. 2013

Appl. Phys. B

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A dual-pass Mach-Zehnder interferometer filter using a section of twin-core fiber (TCF) loop mirror is proposed. The filter is theoretically and experimentally studied for various interferometer arm difference when TCF length is constant. Theoretical results are validated by the experimental demonstration and in good agreement with the experimental results. And then, by using the filter in a ring fiber laser, a stable and switchable dual-wavelength lasing is obtained experimentally. The 3-dB bandwidth and the SMSR of the output laser are 0.015 nm and higher than 62.4 dB, respectively. The peak power fluctuation and wavelength shift are also monitored to be less than 0.04 dB and 0.02 nm over an hour at room temperature. Furthermore, the output laser can be switched between single and dual wavelength by carefully adjusting the PCs. The experimental results show that the filter can suppress mode competition effectively, improve the SMSR availably, and enhance the stability of the output lasing.

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Section: Theoretical Analysis and Experimental Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A dual-pass Mach–Zehnder interferometer filter using a TCF loop mirror for double-wavelength fiber lasers

Zou

Lou

et al. 2013

Appl. Phys. B

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“…S TABLE dual-wavelength erbium-doped fiber ring lasers are very attractive sources for many applications in optical communications, optical fibers sensors, and microwave photonics system [1]- [3]. Especially, a switchable dualwavelength fiber laser is considered to be a desirable candidate as a valuable source for microwave signal generation [2], [3].…”

Section: Introductionmentioning

confidence: 99%

Switchable Dual-Wavelength PM-EDF Ring Laser Based on a Novel Filter

Zou

Lou

Yin

et al. 2013

IEEE Photon. Technol. Lett.

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A stable and switchable dual-wavelength polarization-maintaining erbium-doped fiber ring laser is proposed and demonstrated experimentally by using a novel filter, which is formed from dual-pass Mach-Zehnder interferometer incorporating a sagnac loop. By adjusting the polarization controllers, the output laser can be switched between single-and dual-wavelength. The wavelength spacing of the dual-wavelength can be tuned from 0.084 to 4.26 nm. Its 3-dB bandwidth and side mode suppression ratio are less than 0.015 nm and higher than 64 dB, respectively. In addition, the peak power fluctuation and wavelength shift are monitored to be less than 0.5 dB and 0.01 nm during an hour, respectively. The characteristics of the novel filter in experimental measurement accord with the result of theoretical analysis.

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“…Due to the drastic mode competition induced by homogenous gain broadening effect in EDF, stable dual-wavelength SLM oscillation is not easy to achieve. In recent years, many researchers have reported different techniques to demonstrate stable dual-wavelength SLM EDFLs, such as a novel symmetrical fiber Bragg grating (FBG) structure as compact dual-wavelength laser cavity [2] , a reconfigurable dual-pass Mach-Zehnder interferometer (MZI) filter [18] , an unpumped polarization-maintaining EDF saturable absorber filter [19] , two superimposed FBGs and an in-line two-taper MZI filter [20] , a 70 cm long EDF loop attached to a microfiber coupler as wavelength filter [21] , a polarization-maintaining chirped Moiré FBG as ultra-narrow filter [22] , and a special U-bending apparatus based filter [23] . However, all of the techniques cannot achieve continuously tunable wavelength-spacing, switchable single-/dual-wavelength operation and narrow linewidth lasing simultaneously.…”

mentioning

confidence: 99%

Single-/dual-wavelength switchable and tunable compound-cavity erbium-doped fiber laser with super-narrow linewidth

Tian

Yan

Liu

2016

Optoelectron. Lett.

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A single-/dual-wavelength switchable and tunable erbium-doped fiber laser (EDFL) with super-narrow linewidth has been proposed and experimentally demonstrated at room temperature. The fiber laser is based on a compound cavity simply composed of a ring main cavity and a two-ring subring cavity (TR-SC). Regardless of single-or dual-wavelength operation, the EDFL could always work well in single-longitudinal-mode (SLM) state at every oscillating wavelength. In dual-wavelength operation, the spacing could be tuned from 0 nm to 4.83 nm. In single-wavelength operation, the EDFL could lase at a fixed wavelength of 1 543.65 nm or another wavelength with a tunable range of 4.83 nm. The super-narrow linewidths of 550 Hz and 600 Hz for two wavelengths are obtained. The proposed EDFL has potential applications in microwave/terahertz-wave generation and high-precision distributed fiber optical sensing.Dual-wavelength single-longitudinal-mode (SLM) erbium-doped fiber lasers (EDFLs) are considered to be excellent sources for applications such as wavelength division multiplexing transmission system, fiber sensing, optical signal processing, LIDAR, and microwave photonic generation [1][2][3][4][5] . The single-/dual-wavelength switchable operation is another crucial target for research of EDFLs [6] .In order to achieve SLM operation for EDFLs, many configurations have been proposed in the past few decades, such as distributed feedback [7,8] , short-cavity distributed Bragg reflector [9] , conventional linear and ring cavities incorporating complicated ultra-narrow-band filters [10][11][12][13] , and compound cavity [14][15][16][17] . Due to the drastic mode competition induced by homogenous gain broadening effect in EDF, stable dual-wavelength SLM oscillation is not easy to achieve. In recent years, many researchers have reported different techniques to demonstrate stable dual-wavelength SLM EDFLs, such as a novel symmetrical fiber Bragg grating (FBG) structure as compact dual-wavelength laser cavity [2] , a reconfigurable dual-pass Mach-Zehnder interferometer (MZI) filter [18] , an unpumped polarization-maintaining EDF saturable absorber filter [19] , two superimposed FBGs and an in-line two-taper MZI filter [20] , a 70 cm long EDF loop attached to a microfiber coupler as wavelength filter [21] , a polarization-maintaining chirped Moiré FBG as ultra-narrow filter [22] , and a special U-bending apparatus based filter [23] . However, all of the techniques cannot achieve continuously tunable wavelength-spacing, switchable single-/dual-wavelength operation and narrow linewidth lasing simultaneously.In this paper, we propose and demonstrate a single-/dualwavelength switchable and tunable SLM EDFL with super-narrow linewidth based on a compound cavity which consists of a ring main cavity and a two-ring subring cavity (TR-SC). The performance of this EDFL is investigated in detail.The configuration of the proposed EDFL is shown in Fig.1. The fiber laser is based on a compound cavity consisting of a main cavity and a TR-SC. In the main ...

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A tunable and switchable single-longitudinal-mode dual-wavelength fiber laser incorporating a reconfigurable dual-pass Mach–Zehnder interferometer and its application in microwave generation

Cited by 33 publications

References 8 publications

A dual-pass Mach–Zehnder interferometer filter using a TCF loop mirror for double-wavelength fiber lasers

A dual-pass Mach–Zehnder interferometer filter using a TCF loop mirror for double-wavelength fiber lasers

Switchable Dual-Wavelength PM-EDF Ring Laser Based on a Novel Filter

Single-/dual-wavelength switchable and tunable compound-cavity erbium-doped fiber laser with super-narrow linewidth

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