Interferometric and Multiband optical Parametric Amplifiers for Communications (IMPAC)

电信支撑着现代生活的许多领域，尤其是日益增长的数字经济。电信传输能力的快速增长以及每比特成本的显著降低使新技术和商业模式的发展成为可能，这些新技术和商业模式彻底改变了人们的日常生活。电信主干是由光纤通信组成的，能够在地球上几乎任何点之间传输大量数据。在过去几十年中，光纤通信传输能力的成倍增长主要是通过几项技术突破实现的，例如使用掺铒光纤放大器或相干接收器。带来光纤通信革命性转变的下一个重大进步可能是采用多频段传输，利用现代光通信光纤中可用的全部带宽。多频段光通信具有将传输容量扩大五倍的潜力，而无需部署新的传输光纤，从而显著降低成本。然而，采用多频段传输的关键挑战是缺乏合适的能够在感兴趣的波长段和跨多个频段同时工作的光放大器。该项目名为用于通信的干涉和多频段光参量放大器(IMPAC)，将提供光纤参数放大器(FOPA)所必需的关键进展，以使光纤参数放大器(FOPA)能够在所有适用于多频段通信(O、E、S、C、L)的波长上实现与EDFA等效的信号放大，并且带宽超过100 nm，可能高达200 nm。在IMPAC中，我将：1.创建一个完全自主和稳健的偏振不敏感(PI)FOPA，在创纪录的宽带宽100nm2上具有高净增益和低偏振相关增益0.5db。先锋干涉型FOPA拒绝不需要的FWM产品，将可用增益带宽增加一倍，或通过抑制~20dB.3‘消除’非线性串扰。显著(因数10)降低了由于受激布里渊散射抑制而产生的信号噪声，同时允许至少~100 nm的宽FOPA增益带宽。首创用于信号和泵浦放大的增益跨O/E/S频段可调的PI-FOPA，从而在SSMF.5中创建了第一个分布式PI-FOPA。设计的“下一代”PI-FOPA结合了在增益带宽、低噪声系数、拒绝不需要的FWM和SBS缓解方面的项目成果，以便于在高达200 NM的带宽上运行，性能优于商用EDFA。

Telecommunications underpin many sectors of modern life and especially the growing digital economy. The rapid growth of the telecommunications transmission capacity along with the significant reduction of the cost per bit has enabled development of new technologies and business models which revolutionised everyday life. The telecommunications backbone is formed by fibre optic communications enabling transmission of vast amount of data between virtually any points on the Earth. Multiplication of the fibre optic communications transmission capacity in the past decades have been provided mostly by several technological breakthroughs, such as employment of Erbium-doped fibre amplifiers or coherent receivers. The next significant advancement providing a revolutionary shift in fibre optic communications could be employment of multi-band transmission utilising the whole bandwidth available in modern optical communication fibres. Multi-band optical communications have potential to five-fold the transmission capacity without need to deploy new transmission fibres thus significantly reducing the costs. However, the key challenge for employment of multi-band transmission is lack of suitable optical amplifiers able to operate in the wavelength bands of interest and across several bands simultaneously.This project, Interferometric and Multiband optical Parametric Amplifiers for Communications (IMPAC), will provide the key advances necessary for fibre optic parametric amplifiers (FOPA) to enable EDFA-equivalent signal amplification in all wavelength bands appealing for multi-band communications (O, E, S, C, L) and with bandwidth in excess of 100 nm, potentially up to 200 nm. In IMPAC I will:1. Create a fully autonomous and robust polarisation-insensitive (PI) FOPA with high net gain >20dB and low polarisation-dependent gain <0.5dB across a record wide bandwidth >100nm.2. Pioneer interferometric FOPAs rejecting unwanted FWM products to double available gain bandwidth or to 'eliminate' nonlinear crosstalk with suppression of ~20dB.3. Significantly (by a factor of 10) reduce the signal noise attributed to the stimulated Brillouin scattering mitigation, whilst allowing for a wide FOPA gain bandwidth of at least ~100nm.4. Pioneer a PI-FOPA with gain tuneable across O/E/S bands for signal and pump amplification, and consequently create the first-ever distributed PI-FOPA in SSMF.5. Devise the 'next generation' PI-FOPA combining the project achievements in terms of gain bandwidth, low noise figure, rejection of unwanted FWM and SBS mitigation to facilitate operation across a bandwidth up to 200nm with performance superior to commercial EDFAs.