Multiwavelength Brillouin fiber laser with enhanced reverse-S-shaped feedback coupling assisted by out-of-cavity optical amplifier

Rahman, Zihadur; Hitam, S.; Al-Mansoori, M. H.; Abas, Ahmad Fauzi; Mahdi, Mohd Adzir

doi:10.1364/oe.19.021238

Cited by 23 publications

(15 citation statements)

References 9 publications

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“…Utilizing intracavity BP preamplification technique, tunable L‐band multiwavelength BEFL was also proposed . An out‐of‐cavity optical amplifier was used in the S‐band multiwavelength Brillouin fiber laser .…”

Section: Introductionmentioning

confidence: 99%

Tunable Multiwavelength Brillouin‐Erbium Fiber Laser Based on Fiber Amplified Loop

Dai

Zhou

2013

Micro & Optical Tech Letters

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more compact than those presented in Refs. 7-9, the 3 dB ARBW for the proposed design is broader than for those in the Refs. 7-9. The measured radiation pattern of the proposed antenna in the x-y planes at 2.45 MHz is plotted in Figure 8. It was observed that the field intensity of the right-hand circular polarization is about 25 dB higher than that of the left-hand circular polarization (LHCP) in the 1z-direction, whereas the LHCP is dominant in the -z-direction. The measured and simulated maximum gains of the proposed antenna are shown in Figure 9. They were 4.87 and 3.85 dBic, respectively. The maximum gain variations within the desired frequency band were 2.9 and 2.3 dB. The measured radiation efficiency was higher than 75% in the 3 dB AR bandwidth. CONCLUSIONThe proposed antenna has wide 10 dB return loss bandwidth and 3 dB ARBW and has small dimensions. The experimental results show that the measured 10 dB return loss band-width is 46% (2170-3290 MHz), and the 3 dB axial-ratio bandwidth becomes 29% (2110-2820 MHz), which is wide enough to cover the full ISM band. The overall size of the antenna is only 36 3 36 3 1.6 mm 3 . The achieved features make the proposed antenna a good candidate for modern WBAN systems requiring small size, low weight, and low production cost.ABSTRACT: A novel linear multiwavelength Brillouin-erbium fiber laser based on a nonlinear fiber amplified loop is demonstrated. The nonlinear fiber amplified loop induces wavelength-dependent cavity loss and it provides flexibility on controlling the amount of light reflected and transmitted into and out of the laser's cavity. At the Brillouin pump (BP) power of 25 mW and the 980 nm pump power of 200 mW, 21 output channels with 0.08 nm channel spacing are achieved. We realize the tunable output of multiwavelength through adjusting the polarization controller and the BP wavelength.

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Section: Introductionmentioning

confidence: 99%

Tunable Multiwavelength Brillouin‐Erbium Fiber Laser Based on Fiber Amplified Loop

Dai

Zhou

2013

Micro & Optical Tech Letters

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“…By using the same concept of virtual mirror, a linear MWBEFL that uti lizes double pass amplification technique to pream plify the BP signal was proposed to reduce the thresh old power of the fiber laser and enhance the generation of BS signals [11]. A multiwavelength Brillouin optical comb with 45 nm tuning range was obtained by Abd Rahman et al in [12]. The widely tuning range benefits from using an enhanced reverse S shaped feedback coupling which results in the oscillating modes in the cavity are directly influenced solely by the Brillouin gain.…”

Section: Introductionmentioning

confidence: 99%

Double Brillouin frequency spaced multiwavelength Brillouin-erbium fiber laser with 50 nm tuning range

et al. 2012

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A 50 nm tuning range multiwavelength Brillouin-erbium fiber laser (MWBEFL) with double Brillouin frequency spacing is presented. Two separated gain blocks with symmetrical architecture, consisted by erbium doped fiber amplifiers (EDFAs) and Brillouin gain media, are used to generate double Brillouin frequency spacing. The wider tuning range is realized by eliminating the self lasing cavity modes existing in conventional MWBEFLs because of the absence of the physical mirrors at the ends of the linear cavity. The Brillouin pump (BP) is preamplified by the EDFA before entering the single mode fiber (SMF), which leads to the reduction of threshold power and the generation enhancement of Brillouin Stokes (BS) signals. Four channels with 0.176 nm spacing are achieved at 2 mW BP power and 280 mW 980 nm pump power which can be tuned from 1525 to 1575 nm.

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“…The nonlinearity phenomena in a fiber have been suggested by Cowle and Stepanov [5] as one of the various techniques to obtain multiwavelength laser by combining the nonlinear Brillouin gain medium and linear Erbium doped fiber gain. Since then, many approached have been proposed to enhance the Brillouin erbium fiber laser (BEFL) performance [6][7][8][9][10] The tuning range and the large number of output channels are desirable for BEFL sources. The large number of Brillouin Stokes lines can be achieved at the peak gain of the erbium doped fiber (EDF).…”

Section: Introductionmentioning

confidence: 99%

“…By using this concept, up to 4 channels was successfully tuned over the whole amplification band in a ring cavity [8]. The same technique was implemented in the enhanced reverse-S-shaped BEFL structure by splicing out-of-cavity optical amplifier [9]. In that setup, eleven laser lines can be tuned over 45 nm wavelengths from 1520 nm to 1565 nm.…”

Section: Introductionmentioning

confidence: 99%

Multiwavelength Brillouin erbium fiber laser in virtual linear cavity

Al-Alimi

Abas

Mahdi

et al. 2012

2012 IEEE 3rd International Conference on Photonics

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A multiple wavelength Brillouin/erbium fiber laser in a virtual linear cavity configuration is demonstrated. The virtual linear cavity is formed by utilizing a double pass amplification box at one end of the cavity, and a virtual mirror on the other end. The virtual mirror is created by the stimulated Brillouin scattering (SBS) effect in standard single mode fiber. The tunability limitation of conventional MWBEFLs is eliminated by using half mirrorless linear cavity technique. Due to the large amount of gain achieved by the double pass amplification box, 7 Stokes lines are achieved at pump power and Brillouin pump power of 130 mW And 0 dBm, respectively. Up to 4 channels can be freely tuned over a tuning range of 37.5 nm from 1530 nm 1567 nm.

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Multiwavelength Brillouin fiber laser with enhanced reverse-S-shaped feedback coupling assisted by out-of-cavity optical amplifier

Cited by 23 publications

References 9 publications

Tunable Multiwavelength Brillouin‐Erbium Fiber Laser Based on Fiber Amplified Loop

Tunable Multiwavelength Brillouin‐Erbium Fiber Laser Based on Fiber Amplified Loop

Double Brillouin frequency spaced multiwavelength Brillouin-erbium fiber laser with 50 nm tuning range

Multiwavelength Brillouin erbium fiber laser in virtual linear cavity

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