Observation of equivalent Rayleigh scattering mirrors in lightwave systems with optical amplifiers

Gimlett, J.L.; Iqbal, M. Zafar; Cheung, N.K.; Righetti, A.; Fontana, F.; Grasso, G.

doi:10.1109/68.50892

Cited by 64 publications

(14 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 2 shows the response obtained when the Rayleigh scattering lasing is generated by the distributed mirror: (a) double Rayleigh scattering (DRS) lasing when is observed in Raman copropagating and (b) Rayleigh scattering (RS) lasing when is observed in Raman counterpropagating. The lasing is because of the distributed mirror created inside the DCF and corresponds to a similar effect such as the reflections of two discrete mirrors with effective reflectance proportional to the ratio of the total backscattered to the incident power [17].…”

Section: Resultsmentioning

confidence: 99%

Rayleigh assisted Brillouin effects in distributed Raman amplifiers under saturated conditions at 40 Gb/s

Giraldi

Rocha

Neto

et al. 2010

Micro & Optical Tech Letters

View full text Add to dashboard Cite

mm. The strips of the three-line-microstrip section have a width of 1.4 mm and are separated a distance of 0.2 mm. The microstrip sections have a width of 4.6 mm to achieve a characteristic impedance of 50 X.For the circuit simulation, the characteristic impedances and propagation constants of the ee, oo, and oe modes have been obtained from an electromagnetic analysis performed with Agilent TM Momentum. The via holes have been modeled using the model proposed in [8]. Figure 5 compares the measured and simulated [using the circuit model of Figure 4(b)] S 11 and S 21 parameters of the designed filter, showing a good agreement. The measured and simulated insertions losses are 1.2 and 0.7 dB, respectively. The measured and simulated bandwidths are 9.7 and 10.1%, respectively. The results validate both the multimodal approach and the filter structure proposed in this letter. CONCLUSIONSIn this letter, a new two-pole compact BPF using an asymmetric short-circuited spurline resonator is presented. It has been analyzed by means of a new multimodal model for a microstrip to three-linemicrostrip cross. This multimodal model provides a useful tool to parametrically study the dependence of the filter performance on its dimensions. Based on this parametric study, a series of design rules has been obtained, which allow a rapid fine tuning of the filter central frequency and bandwidth. Finally, a BPF with a 1.9-GHz center frequency has been designed, simulated, and measured. Simulations and measurements show a good agreement, and therefore, validate both the filter structure and its multimodal model. ACKNOWLEDGMENTS

show abstract

Section: Resultsmentioning

confidence: 99%

Rayleigh assisted Brillouin effects in distributed Raman amplifiers under saturated conditions at 40 Gb/s

Giraldi

Rocha

Neto

et al. 2010

Micro & Optical Tech Letters

View full text Add to dashboard Cite

show abstract

“…3(a) and G1G2R1R2 in Fig. 3(b), where G, G1 and G2 were the bidirectional gain, the unidirectional gain of downstream signal and upstream signal in the optical amplifiers, and R1 and R2 were the reflectance coefficients at both sides of bidirectional amplifiers, respectively [5,8]. In case of Fig.…”

Section: Resultsmentioning

confidence: 99%

“…This is because various optical amplifiers, such as erbium-doped fiber amplifier (EDFA), semiconductor optical amplifier (SOA) and Raman amplifier, could provide an extended reach and/or a high split-ratio for the cost-effective implementation of PONs. However, it has been well known that the performance of bidirectional transmission systems over a single fiber could be degraded by the in-band crosstalk [5]. In principle, the in-band crosstalk components would be generated by a double Rayleigh backscattering (DRB) and discrete reflection points within a transmission fiber, and amplified with the gain of bidirectional optical amplifier.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Bidirectional Optical Amplifiers for Amplified Passive Optical Network Based on Broadband Light Source Seeded Optical Sources

Kang¹,

Kim²

2011

Journal of the Optical Society of Korea

View full text Add to dashboard Cite

We have evaluated the performances of bidirectional optical amplifiers which were suited for the costeffective implementation of amplified bidirectional passive optical networks (PONs). First, we measured the maximum gains of two simple bidirectional optical amplifiers implemented without using any optical components for the suppression of reflected signals. From the results, the maximum gains of two simple bidirectional amplifiers with a broadband light source (BLS) seeded optical source were limited to be 27 dB due to the reflection-induced in-band crosstalk, when the reflectance coefficients were measured to be -33 dB in both directions. Then, we have also implemented a bidirectional optical amplifier with two band splitters for the amplified bidirectional PON where the two different wavelength bands were allocated to the downstream and upstream signals transmission. In our measurement, we confirmed that the maximum gain of bidirectional optical amplifier with two band splitters could be increased to more than 30 dB owing to the efficient suppression of in-band crosstalk.

show abstract

“…This is because various optical amplifiers, such as erbium-doped fiber amplifier (EDFA), semiconductor optical amplifier (SOA) and Raman amplifier, could provide a long reach and/or a high split-ratio for the cost-effective implementation of passive optical networks (PONs). However, in the amplified PON architectures, the system's performance could be limited by the in-band crosstalk generated with a double Rayleigh backscattering (DRB) within a transmission fiber, especially when the downstream and upstream signals would transmit simultaneously through a single fiber [5]. Recently, it has been reported that the broadband light source (BLS) based optical sources for WDM-PON architectures, such as a spectrum-sliced source, a wavelength-locked Fabry-Perot laser diode (FP-LD) and a reflective SOA (RSOA), were more tolerant to the in-band crosstalk than a DFB-LD source [6].…”

Section: Introductionmentioning

confidence: 99%

“…3(a) and (b). In our measurements, the crosstalk-to-signal ratio could be estimated with G 2 R 1 R 2 or G 1 G 2 R 1 R 2 , where G, G 1 and G 2 were the bidirectional and unidirectional gain of optical amplifiers, and R 1 and R 2 were the reflectance coefficients at both sides of bidirectional amplifiers, respectively [5,7]. For all measurements with an amplified WDM-PON shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Limitation on gain of bidirectional amplifier in amplified WDM-PON using broadband light source seeded optical sources

Kang

Kim

2010

2010 Photonics Global Conference

View full text Add to dashboard Cite

We investigated the effect of in-band crosstalk on the bidirectional gain in amplified wavelength-division multiplexed passive optical networks (WDM-PONs). In a bidirectional transmission system over a single fiber, the system's performance could be degraded by the in-band crosstalk generated with a double Rayleigh backscattering within a transmission fiber and a gain of bidirectional optical amplifier. Thus, the maximum gain of bidirectional optical amplifier in an amplified WDM-PON was evaluated with a broadband light source (BLS) seeded optical source. Using two simple bidirectional amplifiers without any optical components for the suppression of reflected signals, we found that the bidirectional gain could be increased to be 27 dB with a BLS seeded optical source.

show abstract

Observation of equivalent Rayleigh scattering mirrors in lightwave systems with optical amplifiers

Cited by 64 publications

References 3 publications

Rayleigh assisted Brillouin effects in distributed Raman amplifiers under saturated conditions at 40 Gb/s

Rayleigh assisted Brillouin effects in distributed Raman amplifiers under saturated conditions at 40 Gb/s

Performance Evaluation of Bidirectional Optical Amplifiers for Amplified Passive Optical Network Based on Broadband Light Source Seeded Optical Sources

Limitation on gain of bidirectional amplifier in amplified WDM-PON using broadband light source seeded optical sources

Contact Info

Product

Resources

About