Engineering an Extended Gain Bandwidth Hybrid Raman—Optical Parametric Amplifier for Next Generation CWDM PON

Sharma

Advances in Optical Technologies

2016

We demonstrate improved performance of parametric amplifier cascaded with Raman amplifier for gain of 54.79 dB. We report amplification of L-band using 100 × 10 Gbps Dense Wavelength Division Multiplexed (DWDM) system with 25 GHz channel spacing. The gain achieved is the highest reported so far with gain flatness of 3.38 dB without using any gain flattening technique. Hybrid modulated parametric pump is used for suppressing four-wave mixing (FWM) around pump region, resulting in improvement of gain flatness by 2.42 dB. The peak to peak variation of gain is achieved less than 1.6 dB. DWDM system with 16-channel, 25 GHz spaced system has been analyzed thoroughly with hybrid modulated parametric pump amplified Raman-FOPA amplifier for gain flatness and improved performance in terms of BER and -factor.

Section: Advances In Optical Technologiesmentioning

confidence: 99%

Novel Raman Parametric Hybrid L-Band Amplifier with Four-Wave Mixing Suppressed Pump for Terabits Dense Wavelength Division Multiplexed Systems

Sharma

Advances in Optical Technologies

2016

“…In [8], we proposed and demonstrated the operation of the HROPA configuration for amplification of the top half of the CWDM band (e.g., 1450 nm to 1610 nm). We also described and implemented a method to overcome crosstalk issues related to the generation of idlers due to the parametric process.…”

Section: Amplifier Configurationmentioning

confidence: 99%

“…Since DS and US traffic in a CWDM PON counter propagate, we can separately amplify the two bands [2,3]. The same concept used for the implementation of the HROPA design in [8] can be implemented to cover the lower half of the CWDM band (e.g., 1270 nm to 1430 nm), as shown in Figure 1. However, as we will discuss later, there are some significant differences in the design that affect the HROPA performance and applicability of the previous design.…”

Section: Amplifier Configurationmentioning

confidence: 99%

“…It exhibited a 208-nm bandwidth and a gain in excess of 10 dB; however, a very high gain ripple of ~12 dB [5] made it inappropriate for network-type applications; furthermore, the effect of the generation of multiple idler wavelengths from the parametric process was not addressed. Recently, we presented the results for a 170-nm bandwidth HROPA with <4 dB gain ripple and minimum gain of 20 dB using only three pumps operating only at the upper band (e.g., 1450 nm-1610 nm) of the CWDM wavelengths [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Performance Analysis of a Hybrid Raman Optical Parametric Amplifier in the O- and E-Bands for CWDM PONs

et al. 2014

We describe a hybrid Raman-optical parametric amplifier (HROPA) operating at the O-and E-bands and designed for coarse wavelength division multiplexed (CWDM) passive optical networks (PONs). We present the mathematical model and simulation results for the optimization of this HROPA design. Our analysis shows that separating the two amplification processes allows for optimization of each one separately, e.g., proper selection of pump optical powers and wavelengths to achieve maximum gain bandwidth and low gain ripple. Furthermore, we show that the proper design of optical filters incorporated in the HROPA architecture can suppress idlers generated during the OPA process, as well as other crosstalk that leaks through the passive optical components. The design approach enables error free performance for all nine wavelengths within the low half of the CWDM band, assigned to upstream traffic in a CWDM PON architecture, for all possible transmitter wavelength misalignments (6 nm) from the center wavelength of the channel band. We show that the HROPA can achieve error-free performance with a 170-nm gain bandwidth (e.g., 1264 nm-1436 nm), a gain of >20 dB and a gain ripple of <4 dB. OPEN ACCESSPhotonics 2014, 1 474

“…Пока создание любого из указанных усилителей является очень сложной задачей. Поэтому в данных системах предла-галось использовать различные схемы усиления на основе комбиниро-вания полупроводниковых усилителей, эрбиевых волоконных усили-телей, оптических параметрических и ВКР-усилителей [4]. Однако обеспечение оптического усиления по приемлемой для этих систем стоимости все еще встречает серьезные затруднения.…”

Section: Introductionunclassified

Untitled

2015

Aph

Научный центр волоконной оптики РАН, Москва, Россия ВОЛОКОННЫЕ СВЕТОВОДЫ, ЛЕГИРОВАННЫЕ ВИСМУТОМ, -НОВАЯ АКТИВНАЯ СРЕДА ДЛЯ ЛАЗЕРОВ И УСИЛИТЕЛЕЙ БЛИЖНЕГО ИК-ДИАПАЗОНАПриведен обзор оптических свойств волоконных световодов, легированных висмутом. Представлены характеристики лучших по состоянию на данный момент лазеров и оптических усилителей созданных на основе волоконных световодов, легированных висмутом. Кратко обсу-ждены проблемы применения висмутовых активных сред.Ключевые слова: висмут, волоконный световод, волоконный лазер, волоконный оптиче-ский усилитель. S.V. Firstov, S.V. Alyshev, M.A. Melkumov, K.E. Rumkin, A.V. Shubin, E.M. DianovFiber Optics Research Center of Russian Academy of Sciences, Moscow, Russian Federation BISMUTH-DOPED OPTICAL FIBERS -A NEW ACTIVE MEDIUM FOR NIR LASERS AND OPTICAL AMPLIFIERSAn overview of the optical properties of bismuth-doped optical fibers is presented. The current state of the art in the creation of bismuth-doped fiber lasers and optical amplifiers is described. The problems accounted in practical use of the bismuth-doped fiber lasers and optical amplifiers are briefly discussed.