Channel-switchable single-/dual-wavelength single-longitudinal-mode laser and THz beat frequency generation up to 3.6 THz

Sun, Qizhen; Wang, J.; Tong, Wulin; Luo, Jun-Wei; Liu, D.

doi:10.1007/s00340-011-4780-0

Cited by 11 publications

(5 citation statements)

References 9 publications

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“…Pan et al [12] demonstrated a dual-wavelength SLM EDFL with an ultra-narrow Fabry-Perot filter. Sun et al [13] demonstrated a dual-wavelength SLM laser with tunable filters, a Fabry-Perot etalon and a section of unpumped polarization maintaining an erbium-doped fiber. Ahmad [14][15][16] realized a dual-wavelength EDFL using polarization-dependent loss control and a photonic crystal fiber (PCF), and a dual-wavelength thulium-doped fiber laser using PCF.…”

Section: Introductionmentioning

confidence: 99%

Dual-wavelength single-longitudinal-mode erbium-doped fiber laser with Mach–Zehnder interferometer and saturable absorber loop

Liu¹,

Zhang²,

Li³

et al. 2018

Laser Phys.

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A stable dual-wavelength erbium-doped fiber laser (DW-EDFL) in the single longitudinal mode (SLM) with a Mach-Zehnder interferometer (MZI) and a saturable absorber loop (SAL) is proposed and demonstrated experimentally. Dual wavelengths are obtained with different MZI arm lengths. After the first mode selection of the tunable fiber Bragg grating, SLM operation of the dual-wavelength is acquired by the SAL based on the Vernier effect and spatial hole burning, which induce an auto-tracking narrow bandwidth filter with an optical coupler and a 2 m unpumped erbium-doped fiber (EDF). The output of the DW-EDFL shows good performance, achieving 1.08 kHz at dual wavelengths of 1558.67 nm and 1558.77 nm. The interval of the dual wavelength is 0.1 nm, which has a good agreement with the theoretical value, and the peak powers are −5.508 dBm and −5.993 dBm, respectively under 170 mW pump power. Meanwhile, because of the automatic tracking of the wavelength of the SAL, the optical power instability and beating frequency fluctuation of the dual wavelength are less than 0.5 dB and 0.5 MHz, respectively, showing favorable stability.

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Section: Introductionmentioning

confidence: 99%

Dual-wavelength single-longitudinal-mode erbium-doped fiber laser with Mach–Zehnder interferometer and saturable absorber loop

Liu¹,

Zhang²,

Li³

et al. 2018

Laser Phys.

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“…In order to obtain an SLM fiber laser with a narrow linewidth, several techniques have been reported [5][6][7][8][9][10][11][12][13][14][15][16]. A common approach is utilizing two fiber grating reflectors to realize cavity feedback and wavelength selectivity in the linear laser, which leads to the length of the laser cavity, which needs to be shortened a few centimeters for the SLM operation [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…In previous reports, researchers adopted many methods to avoid this problem, such as using a section of unpumped EDF as a saturable absorber (SA) to realize SLM operation [8,9]. The Fabry-Perot resonator [10,11] and semiconductor optical amplifier (SOA) [12] have also been used to suppress multilongitudinal-mode oscillation. However, it exhibits high insertion loss and is difficult to be fabricated, thus making it considerably expensive.…”

Section: Introductionmentioning

confidence: 99%

Stable single-longitudinal-mode erbium-doped fiber laser with narrow linewidth utilizing parallel fiber ring resonator incorporating saturable absorber and fiber Bragg grating

Zhang

Liu

et al. 2015

Appl. Opt.

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A stable, single-frequency, narrow linewidth ring erbium-doped fiber laser (EDFL) is proposed and demonstrated experimentally. The main ultranarrow filter of the ring cavity EDFL is realized by an improved Mach-Zehnder interferometer, which consists of two parallel optical fiber ring resonators (FRRs). The FRRs share a saturable absorber and a fiber Bragg grating. Attributed to the Vernier effect, the single longitudinal mode operation is successfully obtained. The output of the EDFL can present good performance with a narrow linewidth of 1.09 kHz at 1549.57 nm and a high optical signal-to-noise ratio of 68 dB. Meanwhile, the laser has a relatively low threshold of 10.7 mW. In addition, the central wavelength variation and power fluctuation of the laser are less than 0.002 nm and 0.2 dB, respectively, showing favorable stability.

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“…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] .…”

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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Channel-switchable single-/dual-wavelength single-longitudinal-mode laser and THz beat frequency generation up to 3.6 THz

Cited by 11 publications

References 9 publications

Dual-wavelength single-longitudinal-mode erbium-doped fiber laser with Mach–Zehnder interferometer and saturable absorber loop

Dual-wavelength single-longitudinal-mode erbium-doped fiber laser with Mach–Zehnder interferometer and saturable absorber loop

Stable single-longitudinal-mode erbium-doped fiber laser with narrow linewidth utilizing parallel fiber ring resonator incorporating saturable absorber and fiber Bragg grating

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

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