Dual-wavelength single-longitudinal-mode erbium-doped fibre laser based on fibre Bragg grating pair and its application in microwave signal generation

Chen, D.; Fu, Hongyan; Liu, W.; Wei, Yizhen; He, Sailing

doi:10.1049/el:20083570

Cited by 54 publications

(28 citation statements)

References 10 publications

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“…At the optimum EDF lengths of 12 m and 16 m, the output powers and slope efficiencies are 17.38 mW and 13.37% and 18.2 mW and 14%, respectively. The outputs powers achieved in .4 dBm reported in [13], and about 4 mW achieved in [15]. The SMSR dependency on the pump power and pump wavelength for different EDF lengths is depicted in Fig.…”

Section: Resultsmentioning

confidence: 88%

Optimization of tunable dual wavelength erbium-doped fiber laser

et al. 2009

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This paper reports the design optimization of a novel tunable dual wavelength erbium doped fiber ring laser. The effects of pump wavelength, active fiber length, and coupling ratio on threshold pump power, output power, and side mode suppression ratio (SMSR) of the lasers are investigated. Pumping at wavelength of 1480 nm provides high output and lower threshold power of 2.8 mW. The optimum erbium-doped fiber (EDF) length requires for a given pump power varies as a function of pump wavelengths. The pump wavelength and EDF length have no effect on the laser stability.

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Section: Resultsmentioning

confidence: 88%

Optimization of tunable dual wavelength erbium-doped fiber laser

et al. 2009

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“…The optical LO signal is generated by a home-made dualwavelength single-longitudinal-mode (SLM) erbium-doped fiber (EDF) laser [13]. The laser's output is centered at LO ϭ ( LO1 ϩ LO2 )/2 ϭ 1549.42 nm and the frequency difference between the two wavelength in this experiment is f LO ϭ 9.58 GHz.…”

Section: Experimental Setup and Resultsmentioning

confidence: 99%

All‐optical frequency converter based on fiber four‐wave mixing for bidirectional radio‐over‐fiber systems

Gao

2009

Micro & Optical Tech Letters

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cost. If the thickness of the substrate could be less, more size reduction effect could be achieved. However, the limitation of the line width in our PCB process is 0.15 mm. The photograph of the fabricated MEBE-on-microstrip coupler is shown in Figure 6. EVALUATION OF MEBE-ON-MICROSTRIP HYBRID COUPLERFigures 7 and 8 show the designed and measured scattering parameters corresponding to the conventional branch-line and proposed couplers, respectively. The MEBE-based coupler exhibits an insertion loss not greater than 3.5 dB at the operating frequency, which is comparable with the conventional one. The measured reflection coefficients are below 20 dB. The measured isolation between ports 1 and 3 is also better than 25 dB at the operating frequency band. The proposed coupler operates in the same way as the conventional one, but effectively rejects the 2nd and 3rd spurious harmonics by Ϫ25 and Ϫ19 dB, respectively. Obviously, rather than the large size, the conventional rat-race hybrid ring suffers severely from the interference of harmonics. Table 1 lists the comparisons between existing MEBE-on-microstrip [19 -21], conventional, and proposed rat-race hybrid couplers. CONCLUSIONThis article presents a novel MEBE cell and its attractive application in rat-race hybrid ring coupler. Design motivation is for harmonics suppression and miniaturization. The insertion losses of less than 3.5 dB, less than 20 dB return loss, and isolation of better than 25 dB are obtained. In addition, a 25-dB suppression for the 2nd harmonic and a 19-dB suppression for the 3rd harmonic are also achieved, together with reducing circuit area by 64.62% relative to conventional rat-race coupler without sacrificing the performance. The proposed planar MEBE structure enables an easy implementation in common PCB process with no rigorous and additional process steps such as 3D technology, additional lumped components, ground etching, via holes and bonding wire, and holds great promise for use in RF and microwave systems for miniaturization and harmonic suppression. [7,8], cross-absorption modulation (XAM) [9], stimulated Brillouin scattering (SBS) [10], and four-wave-mixing (FWM) [11,12]. Especially, frequency conversion schemes based on FWM in highly nonlinear fibers (HNLFs) have shown fast response, modulation-format transparency, the capacity for both up-and down-conversions, and the potential of realizing multichannel wavelength division multiplexing (WDM) RoF transmission. Although several FWM-based frequency upconversion schemes have been presented [11,12], FWM mechanism used for optical frequency down-conversion is limited. In this article, we propose a simple bidirectional all-optical frequency up/down-converter based on FWM in a section of HNLF, which is based on the same mechanism for both directions. ABSTRACT: A frequency up/down-converter is proposed based on fiber four-wave-mixing (FWM) between the output of a dual-wavelength PRINCIPLEThe principle of frequency up-conversion is shown in Figure 1(a). Two phase-fixed optical modes, LO...

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“…In the optical heterodyning scheme, the main obstacle to generate stable microwave signals with narrow linewidth and low phase noise is to maintain sufficient phase coherence between the two lazer beams. Several techniques to solve the coherence issue have been investigated, including optical injection locking [7], phase locking [8], and dual-longitudinal modes [9] or single-longitudinal-mode (SLM) fiber lazers [10], etc. In the fiber-lazer-based schemes, as both of the longitudinal modes oscillate in the same resonator cavity, no additional phase locking technique is required.…”

Section: Photonic Generation Of Microwave Signals By Exploiting Fibermentioning

confidence: 99%

Photonic generation of microwave signals by exploiting fiber birefringence effect in single‐longitudinal‐mode distributed Bragg reflector fiber lazer

Zeng

Liu

Sun

et al. 2010

Micro & Optical Tech Letters

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ratio, even as low as 1.1. This makes the phase shifter ideal in applications involving FET whose capacitance ratio is normally small. However, such an implementation requires that the maximum and minimum capacitances of the varactor of each load are known accurately. Also, because there is no restriction on the type of the switch in a load, it can be a PIN diode, a FET, or a MEMS provided that proper integration with the rest of the phase shifter circuit is observed.By using a varactor diode and a PIN diode for each load, an experimental phase shifter operating at 2.5 GHz was developed. By considering the parasitics of the diodes and peripheral circuits, the need for inductors in the resonant circuits of the phase shifter was eliminated. The measurement confirmed the accuracy of the theoretical design in general. Any disagreements between the measured and predicted values of the insertion and return losses at some bias voltages were believed to be due to the finite resistances of the diodes and lack of accurate manufacturer's specification of the diodes at the desired operating frequency. It was found that the phase shifter has a bandwidth of $7%. The performance of the new phase shifter can be improved significantly using MMIC technology, where losses and parasitics due to the connections, and varactor devices can be controlled and reduced drastically, and where the PIN diodes can be replaced with FET switches easily for higher efficiency. ABSTRACT: A novel all-optical microwave generation technique based on fiber birefringence effect in single-longitudinal-mode (SLM) distributed Bragg reflector (DBR) fiber lazer is presented. Owing to the birefringence-induced mode splitting, the proposed lazer could provide a microwave signal at $1.72 GHz with a 3 dB bandwidth of $30 kHz. Moreover, another microwave signal at 10.96 GHz could also be generated as transverse pressure was applied onto the proposed lazer. Similar phenomenon was observed when another DBR lazer constructed with Er/Yb co-doped fiber was used, and a microwave signal at 11.47 GHz with $33 kHz linewidth have also been achieved.

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Dual-wavelength single-longitudinal-mode erbium-doped fibre laser based on fibre Bragg grating pair and its application in microwave signal generation

Cited by 54 publications

References 10 publications

Optimization of tunable dual wavelength erbium-doped fiber laser

Optimization of tunable dual wavelength erbium-doped fiber laser

All‐optical frequency converter based on fiber four‐wave mixing for bidirectional radio‐over‐fiber systems

Photonic generation of microwave signals by exploiting fiber birefringence effect in single‐longitudinal‐mode distributed Bragg reflector fiber lazer

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