Novel method to suppress noise in harmonically modelocked erbium fibre lasers

Shan, X.; Spirit, D.M.

doi:10.1049/el:19930652

Cited by 82 publications

(30 citation statements)

References 3 publications

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“…7). The values of SNR obtained by (13) are calculated from RF spectra and found to be similar in all cases: 42.7, 42.9, 41.5, 41.7, 41.3, 40.7, 37.5, and 40.4 dB (standard deviation: 1.6 dB) for 0, 1,3,5,18,50,194, and 426, respectively. Note that, although the power of the leading supermode is in all cases about 40 dB above the average power of other supermodes, supermode beat noise is large, given the large number of unwanted supermodes ( ).…”

Section: Methodsmentioning

confidence: 99%

“…Harvey et al used a high-finesse Fabry-Perot étalon filter, selecting only one supermode, but requiring a stabilization scheme [2]. In [3], dithering of the cavity length at kilohertz rates is thought to reduce spatial hole burning, resulting in a reduction of the unwanted supermodes, but this effect is not clearly understood. Other techniques demonstrated the use of intensity-dependent loss to reduce pulse amplitude fluctuations.…”

Section: Introductionmentioning

confidence: 99%

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Supermode noise of harmonically mode-locked erbium fiber lasers with composite cavity

Pottiez

Deparis

Kiyan

et al. 2002

IEEE J. Quantum Electron.

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Abstract-The supermode noise of a harmonically mode-locked erbium-doped fiber laser with composite cavity is investigated both theoretically and experimentally. We propose a simple model based on the transfer function of the composite cavity. From this model, the frequencies of the cavity modes and their frequency-dependent losses are determined. A comprehensive experimental study of the composite cavity laser is carried out, covering a wide range of path-length differences between both arms of the fiber interferometer that form the composite cavity. Experimental results are in good agreement with our model. In particular, the path length difference determines periodic frequency windows within which supermodes of the composite cavity are observed. Outside these windows, supermodes are not detectable. Our results show quite remarkably that, although the number of supermodes is reduced with respect to the simple cavity, no measurable reduction of the overall supermode noise is obtained, contrary to what has recently been suggested [1].

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Supermode noise of harmonically mode-locked erbium fiber lasers with composite cavity

Pottiez

Deparis

Kiyan

et al. 2002

IEEE J. Quantum Electron.

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“…Similarly, the use of lightly or moderately doped Er fiber results in long cavities which make fiber lasers sensitive to small environmental perturbations, such as thermal fluctuations and acoustic vibration. Although several active stabilization techniques have been developed to counter the instability of long cavity fiber lasers, these increase the complexity of the system [8], [9]. In order to solve these problems, semiconductor optical amplifiers (SOAs) have been deployed in mode -locked laser sources for the generation of short optical pulses at high repetition rates.…”

Section: Introductionmentioning

confidence: 99%

“…The equation of the recovery of the SOA is thus split in two equations which describe the SOA recovery after the transition of the external and mode -locked pulses, respectively. Equations (7) and (8) Substituting (10) in (9), g is eliminated and an expression is obtained which involves only gfn …”

mentioning

confidence: 99%

Numerical Modeling of a High Repetition Rate Fiber Laser, Mode — Locked by External Optical Modulation of a Semiconductor Optical Amplifier

Zoiros

Stathopoulos

Vlachos

et al. 2001

IFIP Advances in Information and Communication Technology

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A theoretical study of a high repetition rate laser source based on a novel modelocking technique is presented. This technique relies on the fast saturation and recovery of a semiconductor optical amplifier induced by an external optical pulse and has been used to obtain 4.3 ps pulses at 20 GHz. A numerical model of the fiber ring laser has been developed describing the mode -locking process in the laser oscillator and providing solutions for the steady -state mode -locked pulse profile. The critical parameters of the system are defined and analyzed and their impact on the formation of the mode -locked pulses is examined. The comparison between the theoretical results and the experimental data reveals very good agreement and has allowed the optimization of the performance of the system in terms of these parameters.

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“…84 Figure 50. Photonic synthesizer phase noise measurements at high frequencies of 60 GHz, and 94 GHz. 85…”

mentioning

confidence: 99%

Radio Frequency Photonic Synthesizer

Logan¹,

Li²

2000

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Novel method to suppress noise in harmonically modelocked erbium fibre lasers

Cited by 82 publications

References 3 publications

Supermode noise of harmonically mode-locked erbium fiber lasers with composite cavity

Supermode noise of harmonically mode-locked erbium fiber lasers with composite cavity

Numerical Modeling of a High Repetition Rate Fiber Laser, Mode — Locked by External Optical Modulation of a Semiconductor Optical Amplifier

Radio Frequency Photonic Synthesizer

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