Supermode beat suppression in harmonically mode-lockederbium-doped fibre ring lasers with composite cavity structure

Onodera, Noriaki

doi:10.1049/el:19970656

Cited by 38 publications

(18 citation statements)

References 5 publications

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“…We derive an analytical expression for the supermode structure and present experimental evidence supporting the theoretical results. Rather unexpectedly, our study demonstrates that the composite cavity does not lead to a significant reduction of the overall supermode noise, contrary to what has been suggested in [1].…”

Section: Introductioncontrasting

confidence: 99%

“…In a ring fiber laser cavity of length , the frequency spacing between cavity modes, i.e., free spectral range , is given by (1) where is the light velocity in vacuum and is the effective refractive index of fiber ( 1.5 in silica). As a starting point, 0018-9197/02$17.00 © 2002 IEEE Fig.…”

Section: A Vernier Principlementioning

confidence: 99%

“…In this case, particular modes that are separated by match each other's frequency [ Fig. 2(b) and (c)]: this is the Vernier principle [1]. Assuming that only these modes that are common to both simple cavities can exist [ Fig.…”

Section: A Vernier Principlementioning

confidence: 99%

“…Let us show that this result is in agreement with that obtained by applying the Vernier principle. Using (9) and definitions of and [see (1)], it can be shown that (10) Equation (10) shows that is equal to the lowest common multiple of and . Indeed, (10) is nothing but (2) with and .…”

Section: B Modelmentioning

confidence: 99%

“…However, this technique does not rely on fiber-optics components. Finally, the composite cavity, whose principle was initially introduced for mode selection and wavelength tuning of CW fiber lasers [7], [8], was proposed to reduce supermode beat noise in harmonically mode-locked erbium-doped fiber lasers [1]. Among the aforementioned techniques, the composite cavity is the most simple and straightforward.…”

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: Introductioncontrasting

confidence: 99%

Section: A Vernier Principlementioning

confidence: 99%

Section: A Vernier Principlementioning

confidence: 99%

Section: B Modelmentioning

confidence: 99%

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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Stable actively mode‐locked fiber‐ring laser with a large dispersion cavity

Yang

et al. 2002

Micro & Optical Tech Letters

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The parameters L, C, ␣, and ␤ of general transmission-line equations are almost invariant to frequency in the passband of the microstrip low-pass filter. In the frequency domain, almost same result as that of MoM can be derived from the general transmission-line equations with the use of the parameters L, C, ␣, and ␤ at the Ϫ3-dB response frequency. The characteristic of ␣ and ␤ is described with an experiential expression, so the better result is derived by using the ␣ and ␤Ј experiential expressions and the parameters L and C at low frequencies. In the time domain, applicable results can also be obtained with the use of the on-line FDTD method, although the applicability of the on-line FDTD method depends on the dispersion characteristics of the general transmission-line equations on specific circuit structure.

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