Input power limits of single-mode optical fibers due to stimulated Brillouin scattering in optical communication systems

Aoki, Yasuhiro; Tajima, K.; Mito, I.

doi:10.1109/50.4057

Cited by 191 publications

(59 citation statements)

References 20 publications

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“…This reduces the effective power launched to trigger nonlinear effects within SM-DSFs. However, since the SBS threshold is lower for narrow band signals [12], it is important to reduce the SBS by modulating the tunable lasers using a low frequency signal around 60 KHz, which does not affect system operation. Experimental results show significant reduction in SBS when we modulated the TL1 and TL2.…”

Section: Experimental Set-up Discussion and Resultsmentioning

confidence: 99%

An over 40 channel multi‐wavelength laser source

Lü

Liu

Zhang

2007

Micro & Optical Tech Letters

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ABSTRACT:We have demonstrated an over 40-channel multi-wavelength laser comb source with the 50-GHz equal frequency spacing between the adjacent channels over the C-band wavelength range. The output spectra could be described by using the simplified stimulated four-wave nonlinear coupled equations taking into account the thirdorder nonlinear optical interaction in the single-mode dispersionshifted fibers.

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Section: Experimental Set-up Discussion and Resultsmentioning

confidence: 99%

An over 40 channel multi‐wavelength laser source

Lü

Liu

Zhang

2007

Micro & Optical Tech Letters

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“…All the incident light above this threshold is completely reflected back and frequency shifted due to stimulated Brillouin scattering (SBS) in the fiber. The frequency shift of this SBS light is given by Dv SBS ͞2p 2ny S ͞l [7,8]. With n 1.458 the refractive index of the fiber, y S 5760 m͞s the velocity of sound in the fiber, and l 589.0 nm the wavelength of the incident light, we find Dv SBS ͞2p 28.51 GHz.…”

Section: (Received 13 March 1996)mentioning

confidence: 99%

Long-Range Predissociation in Two-Color Photoassociation of Ultracold Na Atoms

1996

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We report two-color photoassociative ionization of sodium in a magneto-optical trap. The experimental results yield information on both singly and doubly excited states. We find that the highest bound vibrational levels (y . 20) of the singly excited 0 2 g state predissociate into the 3 2 P 3͞2 1 3 2 S 1͞2 ͑F g 1͒ dissociation continuum due to avoided crossings of the hyperfine components of this potential with other molecular symmetries. Based on symmetry and energy consideration we argue that a doubly excited 1 u state remains autoionizing even when excited only a few GHz above the dissociation continuum. [S0031-9007(96) PACS numbers: 33.80. Gj, 32.80.Pj, 33.15.Mt, 34.50.Rk The rapid development of laser cooling techniques (for a review see [1]) during the last decade has opened the path for study of cold collisions. The narrow thermal energy distribution in which the atoms can be prepared allows spectroscopy with extremely high resolution. One of the reactions that has been studied is the photoassociative ionization reaction for sodium (Na 1 Na 1hv ! Na 2 ‫ء‬ , followed by Na 2 ‫ء‬ 1hv ! Na 2 1 1 e 2 ). The structures in the production of ions as a function of the frequency of the exciting light in these experiments reflects the boundstate structure of the singly excited states ͑Na 2 ‫ء‬ ͒. The second step, which is a bound-free transition, displays no observable structure in these experiments [2][3][4][5][6]. The reaction mechanism at those low energies displays some characteristics different from those in the reaction mechanism at typical thermal temperatures. At thermal energies the associative ionization (AI) reaction involves two atoms prepared in excited states, which due to their thermal motion reach the reaction region where autoionization takes place. At temperatures that can be reached with laser cooling techniques the velocity of the excited atoms is so low (typically a few cm͞s) that they propagate only a few a 0 before they spontaneously emit a photon and decay to the ground state. So the colliding excited atom pair will not survive to the reaction region.Until now, the reaction at low temperature has been described as a three step process [5]. First, the two colliding atoms are excited at long range to a bound singly excited molecular state (Fig. 1). Second, due to the attraction in this bound intermediate state the atoms are effectively accelerated to each other and reach the short internuclear distances where direct photoionization takes place. To distinguish this reaction from the associative ionization reaction this mechanism is referred to as photoassociative ionization (PAI).A number of groups has studied this reaction using only a single exciting laser for the two successive excitation steps [5,6]. Since the last step in this reaction is insensitive to the exciting laser frequency, they found that the production of ions as a function of frequency reflects the structure of the bound singly excited sates. Unfortunately, this excitation scheme is restricted to those singly excited states...

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“…This nonlinear optical process generates a backward-propagating Stokes wave as a reflection that limits the net incident power at the input end to the SBS threshold [7][8][9][10][11][12]:…”

Section: Introductionmentioning

confidence: 99%

Broadband optical chaos for stimulated Brillouin scattering suppression in power over fiber

Chan

Liu

et al. 2011

Appl. Opt.

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Broadband chaos generated in an optically injected semiconductor laser is applied for power-over-fiber transmission. By varying the injection power, period-one oscillation, period-two oscillation, and chaotic oscillation are observed in the injected slave laser, indicating a period-doubling route to chaos. Compared to the free-running output of the laser, its chaotic output has a drastically increased signal bandwidth, which leads to a 19 dB increase of the stimulated Brillouin scattering threshold. Using a chaos of 5:2 GHz bandwidth, a maximum optical power of 27 dBm is obtained after 20 km transmission over fiber, which is applicable to optically powering some advanced communication networks. The approach uses the inherent nonlinear laser dynamics, which requires no modulation electronics or microwave signal sources.

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Input power limits of single-mode optical fibers due to stimulated Brillouin scattering in optical communication systems

Cited by 191 publications

References 20 publications

An over 40 channel multi‐wavelength laser source

An over 40 channel multi‐wavelength laser source

Long-Range Predissociation in Two-Color Photoassociation of Ultracold Na Atoms

Broadband optical chaos for stimulated Brillouin scattering suppression in power over fiber

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