We propose a spectrum-configuration framework for open and disaggregated optical systems that maximizes throughput while guaranteeing the quality of transmission (QoT) margins. The framework jointly optimizes transceiver parameters, including modulation format, symbol rate, pulse-shaping roll-off factor, and wavelength-selective switch (WSS) bandwidth, under fixed spectral allocation constraints. The impact of roll-off factor optimization is first experimentally evaluated in the presence of cascaded WSS filtering, demonstrating measurable QoT gains for both single- and multi-channel transmission. Building on these observations, a knapsack-based optimization is applied in the context of Optical Spectrum as a Service (OSaaS) to select service configurations that maximize aggregate throughput within a fixed spectrum width and limited transceiver resources. Experimental validation on a metro-scale open testbed confirms the effectiveness of the proposed approach in achieving efficient spectrum utilization and adaptive throughput-margin trade-offs.

翻译：我们提出了一种面向开放与可分解光系统的频谱配置框架，该框架在保障传输质量裕度的前提下最大化系统吞吐量。该框架联合优化收发器参数，包括调制格式、符号速率、脉冲成形滚降系数以及波长选择开关带宽，并遵循固定频谱分配约束条件。首先通过级联WSS滤波实验评估了滚降系数优化的影响，结果表明无论是单通道还是多通道传输，该优化均能带来可量化的传输质量增益。基于实验观测结果，在“频谱即服务”场景中应用了基于背包问题的优化方法，用于在固定频谱宽度和有限收发器资源条件下选择能够最大化总吞吐量的业务配置。在城域级开放测试床上开展的实验验证证实了所提方法在实现高效频谱利用与自适应吞吐量-裕度权衡方面的有效性。