Signal stability in periodically amplified fiber transmission systems using multiple quantum well saturable absorbers for regeneration

Burr, E.; Pantouvaki, Marianna; Fice, Martyn J.; Gwilliam, R.; Krysa, A. B.; Roberts, J.S.; Seeds, A.J.

doi:10.1109/jlt.2005.861924

Cited by 8 publications

(5 citation statements)

References 22 publications

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“…SESAMs are grown by molecular beam epitaxy (MBE) or metal-organic vapor phase epitaxy (MOVPE) on distributed Bragg reflectors. [44][45][46][47][48] In addition to strict fabrication requirements, they often undergo high-energy heavy-ion implantation to create defects in order to reduce the recovery time. [24,45] Also, SESAMs can typically cover a narrow (several tens of nm) operation wavelength range.…”

Section: Nanotubes As Saturable Absorbersmentioning

confidence: 99%

Nanotube–Polymer Composites for Ultrafast Photonics

et al. 2009

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Polymer composites are one of the most attractive near‐term means to exploit the unique properties of carbon nanotubes and graphene. This is particularly true for composites aimed at electronics and photonics, where a number of promising applications have already been demonstrated. One such example is nanotube‐based saturable absorbers. These can be used as all‐optical switches, optical amplifier noise suppressors, or mode‐lockers to generate ultrashort laser pulses. Here, we review various aspects of fabrication, characterization, device implementation and operation of nanotube‐polymer composites to be used in photonic applications. We also summarize recent results on graphene‐based saturable absorbers for ultrafast lasers.

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Section: Nanotubes As Saturable Absorbersmentioning

confidence: 99%

Nanotube–Polymer Composites for Ultrafast Photonics

et al. 2009

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“…Among these nonlinear gates, SA-based gates have generated considerable interest in all-optical switching owing to their large nonlinear optical effect, small size, and fully passive operating mode (no bias voltage, no Peltier cooler), thus offering a potentially low-cost solution to signal regeneration [7]. InP-based multiple-quantum-well SAs (MQW-SAs) are currently being investigated for optical telecommunication signal processing because of the facility to obtain an absorption peak at 1.55 µm [5], [7]- [10]; recently, however, GaAs-based MQW-SA [11] and carbon-nanotube-based SA [12] have also been investigated.…”

mentioning

confidence: 99%

Analysis of thermal limitations in high-speed microcavity saturable absorber all-optical switching gates

Massoubre

Oudar

O’Hare

et al. 2006

J. Lightwave Technol.

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The limitations owing to device heating and thermo-optic effects in high-speed quantum-well microcavity saturable absorber devices are investigated both theoretically and experimentally. A simplified theoretical description of the device electronic, thermal, and optical properties is developed and applied to the modeling of the device switching characteristics for reamplification + reshaping step (2R) all-optical regeneration. These predictions are compared to nonlinear optical measurements performed with switching pulses of fixed duration and variable repetition rate on two devices with significantly different thermal properties. It is shown that proper optimization of the device thermal properties is crucial to avoid the degradation of device performance at high bit rate. It is also shown that the negative effects of optically induced heating on the switching contrast may be compensated to some extent by operating the device on the long wavelength side of the microcavity resonanc

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“…The probe FWHM was found to be 1.5 ps at the output of the component. SA alone does not provide regeneration especially because there is no full absorption saturation with telecommunication signals [7]. For complete regeneration, a power limiter completes the SA function as presented in the next section.…”

Section: A Saturable Absorber Structurementioning

confidence: 99%

“…Recent experiments using a microcavity SA have shown extinction ratio enhancement of a 170 GHz clock frequency laser source [4,6]. However, the reported microcavity SA mainly enhances the extinction ratio of the signal without any improvement on high power levels [7]. Consequently, complementary function acting on high power levels is required to achieve a complete 2R regeneration (reamplifying and reshaping).…”

Section: Introductionmentioning

confidence: 99%