Performance improvement of directly modulated semiconductor optical amplifier with filter‐assisted birefringent fiber loop

Zoiros, Kyriakos E.; Morel, Pascal; Hamze, Mohamad

doi:10.1002/mop.29313

Cited by 14 publications

(3 citation statements)

References 20 publications

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“…For this purpose, different optical notch filtering technologies, including a delay interferometer (DI) [17,18], a fiber Bragg grating (FBG) [19], an array waveguide grating (AWG) [20] and a microring resonator [21], have been proposed. Recently, we employed a birefringent fiber loop (BFL), either alone [22], in cascade with another BFL [23] or assisted by an optical bandpass filter (OBPF) [24], to a standard SOA configured as intensity modulator. However, applying this scheme to an RSOA is not a trivial task due to the RSOA double-pass structure, which inherently imposes a greater strain on its dynamic behavior [12,25], especially subject to a fast electrical excitation [26].…”

Section: Introductionmentioning

confidence: 99%

Reflective Semiconductor Optical Amplifier Direct Modulation Capability Enhancement Using Birefringent Fiber Loop

et al. 2020

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The feasibility of employing a birefringent fiber loop to enhance the performance of a directly modulated reflective semiconductor optical amplifier is experimentally demonstrated for the first time. The birefringent fiber loop acts as an optical filter of opposite slope than that of the reflective semiconductor optical amplifier electro-optical response and counteracts the finite reflective semiconductor optical amplifier modulation bandwidth of only 0.89 GHz. By proper adjustment of its detuning, the birefringent fiber loop tailors the spectral components that physically manifest due to the reflective semiconductor optical amplifier dynamic perturbation subject to direct modulation in the saturated gain regime, and suppresses the pattern-dependent distortions in the time domain. In this manner, the birefringent fiber loop manages to significantly improve the quality characteristics of the encoded signal at higher data rates than those enabled by the reflective semiconductor optical amplifier limited modulation capability. Owing to the birefringent fiber loop, the reflective semiconductor optical amplifier modulation range is extended to 4 Gb/s at the raw bit error rate of 1.0×10−9, and to 11 Gb/s at the forward error correction limit of 3.8×10−3. These results, which are unique against the evaluation criterion adopted in the first case, and the modulation speed achieved with post-filtering schemes in the second, highlight the beneficial role that the birefringent fiber loop can play in supporting reflective semiconductor optical amplifier operation for intensity amplification and modulation purposes.

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Section: Introductionmentioning

confidence: 99%

Reflective Semiconductor Optical Amplifier Direct Modulation Capability Enhancement Using Birefringent Fiber Loop

et al. 2020

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“…This approach is simple in concept, all-optical in nature, straightforward to apply, efficient in use and amenable to implementation by employing different technologies [10][11][12][13][14][15][16][17]. In this context, we have proposed applying the specific technique by means of a Birefringent Fiber Loop (BFL), which is characterized by the ease of construction from off-the-shelf fiber components, a potentially stable operation, and flexibly tunable characteristics, first to conventional SOAs [18][19][20] and more recently to RSOAs as well [21]. In this paper, we further elaborate on this topic with dual purpose: First, we aim to validate and establish a model for robustly simulating the operation of the RSOA-BFL combination.…”

Section: Introductionmentioning

confidence: 99%

On Directly Modulated Reflective Semiconductor Optical Amplifier with Assistance of Birefringent Fiber Loop

et al. 2022

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Reflective Semiconductor Optical Amplifiers (RSOAs) are essential devices for the development of new generation networks that rely on the convergence of optical and RF communications. Despite their proven potential for direct modulation, RSOAs’ electro-optic response is limited by their finite bandwidth, which hinders their employment both for signal amplification and modulation at the data rates envisioned by the target applications. In this paper, we elaborate on exploiting a Birefringent Fiber Loop (BFL) to enhance the operation of RSOAs as intensity modulators. We apply a mathematically and computationally reduced model to simulate the RSOA response in the time domain, and correlate it with that of the BFL in the frequency domain. We validate the model’s predictions by an extensive comparison of the simulation against experimental results. The reasonable theoretical findings allow us to establish the employed model as an efficient tool for describing electrically driven RSOA operation and its improvement by means of optical notch filtering. Furthermore, we evaluate and quantify the performance of the scheme and the potential range of RSOA direct modulation capability extension enabled by the BFL, which complies with the experimentally observed trends. The outcomes of this thorough study highlight the BFL supportive role in rendering feasible RSOAs’ direct modulation at data rates beyond those deemed possible by their nominal modulation bandwidth.

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“…Thus, different schemes that act as optical notch filters on RSOA-encoded outputs have been reported, such as the delay interferometer (DI) [17,18], the fiber Bragg grating (FBG) [19] and the arrayed waveguide grating (AWG) [20]. In the same technological category also fall schemes that have been applied on conventional directly modulated SOAs, such as the birefringent fiber loop (BFL), either alone [21], in cascade with another BFL [22] or assisted by an optical bandpass filter [23]; and the microring resonator (MRR) [24]. The MRR is a special form of powerful waveguides [25,26], and exhibits distinctive characteristics over the aforementioned types of employed filters.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Analysis of Directly Modulated Reflective Semiconductor Optical Amplifier Performance Enhancement by Microring Resonator-Based Notch Filtering

Rizou

Zoiros

2018

Applied Sciences

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Abstract:We demonstrate the feasibility of using a single microring resonator (MRR) as optical notch filter for enabling the direct modulation of a reflective semiconductor optical amplifier (RSOA) at more than tripled data rate than possible with the RSOA alone. We conduct a thorough simulation analysis to investigate and assess the impact of critical operating parameters on defined performance metrics, and we specify how the former must be selected so that the latter can become acceptable. By using an MRR of appropriate radius and detuning, the RSOA modulation bandwidth, which we explicitly quantify, can be extended to overcome the RSOA pattern-dependent performance limitations. Thus, the MRR makes the RSOA-encoded signal exhibit improved characteristics that can be exploited in practical RSOA direct modulation applications.

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Performance improvement of directly modulated semiconductor optical amplifier with filter‐assisted birefringent fiber loop

Abstract: International audienc

Cited by 14 publications

References 20 publications

Reflective Semiconductor Optical Amplifier Direct Modulation Capability Enhancement Using Birefringent Fiber Loop

Reflective Semiconductor Optical Amplifier Direct Modulation Capability Enhancement Using Birefringent Fiber Loop

On Directly Modulated Reflective Semiconductor Optical Amplifier with Assistance of Birefringent Fiber Loop

Theoretical Analysis of Directly Modulated Reflective Semiconductor Optical Amplifier Performance Enhancement by Microring Resonator-Based Notch Filtering

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