Efficient modulation cancellation usingreflective SOAs

Dúill, Seán Ó; Marazzi, L.; Parolari, P.; Brenot, R.; Koos, C.; Freude, W.; Leuthold, Juerg

doi:10.1364/oe.20.00b587

Cited by 35 publications

(31 citation statements)

References 11 publications

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“…It was shown that SOA theory is not sufficient to explain the complexity of behavior present with RSOAs [15], the reason being the two waves propagating in the opposite directions competing for gain. RSOAs therefore have three nonlinear operation regimes due to the saturation effect.…”

Section: Feedback and Rinmentioning

confidence: 99%

High temperature stability, low coherence and low relative intensity noise semiconductor sources for interferometric sensors

Komljenović

Bowers

2016

Opt. Express

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Abstract:We investigate self-seeded optical sources for interferometric sensing applications and show that they can, depending on optical filter bandwidth, provide high-output power, high wavelength temperature stability (<5 ppm/°C), low relative intensity noise (<-140 dBc/Hz) and low coherence lengths (<100 um). We characterize the key performance indicators for a range of optical filter bandwidths and provide insight into key design parameters of such sources for interferometric sensors.

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Section: Feedback and Rinmentioning

confidence: 99%

High temperature stability, low coherence and low relative intensity noise semiconductor sources for interferometric sensors

Komljenović

Bowers

2016

Opt. Express

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“…A simplified simulation schematic is given in Figure 4. The RSOA is modeled as a bidirectional SOA as described in [29,30]. The notations…”

Section: Theoretical Modeling Of Rsoa-fclmentioning

confidence: 99%

Self-Seeded RSOA-Fiber Cavity Lasers vs. ASE Spectrum-Sliced or Externally Seeded Transmitters—A Comparative Study

et al. 2015

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Reflective semiconductor optical amplifier fiber cavity lasers (RSOA-FCLs) are appealing, colorless, self-seeded, self-tuning and cost-efficient upstream transmitters. They are of interest for wavelength division multiplexed passive optical networks (WDM-PONs) based links. In this paper, we compare RSOA-FCLs with alternative colorless sources, namely the amplified spontaneous emission (ASE) spectrum-sliced and the externally seeded RSOAs. We compare the differences in output power, signal-to-noise ratio (SNR), relative intensity noise (RIN), frequency response and transmission characteristics of these three OPEN ACCESSAppl. Sci. 2015Sci. , 5 1923 sources. It is shown that an RSOA-FCL offers a higher output power over an ASE spectrum-sliced source with SNR, RIN and frequency response characteristics halfway between an ASE spectrum-sliced and a more expensive externally seeded RSOA. The results show that the RSOA-FCL is a cost-efficient WDM-PON upstream source, borrowing simplicity and cost-efficiency from ASE spectrum slicing with characteristics that are, in many instances, good enough to perform short-haul transmission. To substantiate our statement and to quantitatively compare the potential of the three schemes, we perform data transmission experiments at 5 and 10 Gbit/s.

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“…The analysis of this capability has usually relied on the consideration on travelling wave semiconductor optical amplifiers (SOA) [13]. Nevertheless as highly-nonlinear RSOA are designed and realized [14], SOA theory alone is not sufficient to describe RSOA gain saturation, which results from its specificity [16]. As two waves counterpropagating locally competes for gain, higly depleted regions are created along the RSOA length.…”

Section: Introductionmentioning

confidence: 99%

“…As two waves counterpropagating locally competes for gain, higly depleted regions are created along the RSOA length. It has been recently stemmed [16,18] that according to the injected power value, three nonlinear operation regimes can be evidenced in relation to the RSOA capability to partially cancel the modulation component of the signal. At low input power, the modulation component of the signal is moderately bleached, resulting in an output signal extinction ratio reduction.…”

Section: Introductionmentioning

confidence: 99%

“…This region corresponds to the range, called modulation cancellation dynamic range (MCDR) where the RSOA in supposed to work in order to achieve modulation bleaching. A further increase on input power results in modulation inversion [16] with a new increase of the ER. The two first regimes are easily found in nonlinear SOA, though the power threshold at which they are occurring is usually higher than in RSOA.…”

Section: Introductionmentioning

confidence: 99%

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Highly-nonlinear RSOA RIN compression

Marazzi

Parolari

Boletti

et al. 2014

2014 19th European Conference on Networks and Optical Communications - (NOC)

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It has been recently experimentally and theoretically demonstrated that three nonlinear operation regimes can be observed in reflective semiconductor amplifiers in relation to gain saturation and, consequently, in relation to the bleaching of the modulation portion of the injected signal while the injected power increases. For moderately high-injected power, the modulation component of the signal is partially bleached, i.e., the extinction ratio (ER) is reduced. For higher input power, the modulation is exactly cancelled, i.e., the ER is almost 0 dB. Finally a further increase of injected power determines modulation inversion, with consequent eye re-opening. While the first two phenomena can be observed also in SOAs, though usually at higher injected power, the last regime is specific of RSOAs. In highly nonlinear RSOA the simultaneous presence of two waves, the incoming one and the reflected, which locally compete for gain along the device length, defines areas of strong depletion. The RSOA noise reduction capability, which has been widely exploited in passive optical networks (PON) topologies, is achieved by compressing the optical intensity fluctuations associated to the injected signal. This capability relies on the same mechanism governing gain saturation and modulation bleaching. Thus it is not surprising that the same nonlinear regimes observed in relation to gain saturation can be evidenced in relation to relative intensity noise (RIN) compression. In order to highlight this behavior and its consequences on PON design, we experimentally emulated a spectrum-sliced wavelength division multiplexing (WDM) PON topology. The impact on RIN of the injection into the RSOA and subsequent filtering actions operated by arrayed waveguide gratings (AWG) placed at the remote node and at the optical line terminal is evaluated both experimentally and by simulations. RIN measurements are performed in time domain exploiting a real time oscilloscope and in the spectral domain using an electrical spectrum analyzer in different point of the WDM PON topology to enlighten the different contributions to noise. Simulations have been also using an RSOA simple model, which has been realized with the commercial software, OptSim by RSOFT, and has been implemented by matching the data collected from the RSOA gain experimental characterization

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Efficient modulation cancellation usingreflective SOAs

Cited by 35 publications

References 11 publications

High temperature stability, low coherence and low relative intensity noise semiconductor sources for interferometric sensors

High temperature stability, low coherence and low relative intensity noise semiconductor sources for interferometric sensors

Self-Seeded RSOA-Fiber Cavity Lasers vs. ASE Spectrum-Sliced or Externally Seeded Transmitters—A Comparative Study

Highly-nonlinear RSOA RIN compression

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