研究了采用内调制相位产生载波（PGC）解调的匹配干涉型光纤传感系统中匹配干涉结构对传输光纤拾音噪声的影响。结果表明：当补偿干涉仪与传感部分相邻时，光学微分效应的作用可大幅度降低由传输光纤光路拾音引入的相位调制噪声；匹配光程差的增加不仅加剧了光频噪声向相位噪声的转换，同时也会影响相位调制噪声的转换幅度。通过设计合适的匹配光程差，并将补偿干涉仪进行有效屏蔽后与传感部分相邻放置，可以有效减小系统的相位噪声。研究成果为光纤传感远程传输系统的综合设计及噪声抑制技术提供了理论及实验基础，具有一定的参考意义。

系统地研究了在非线性掺镱光纤放大器中产生宽带光谱的特性,对不同种子脉冲激光的中心波长、放大器增益光纤长度对光谱输出特性的影响进行系统实验及分析。实验中采用非线性偏振旋转锁模技术获得非线性放大器的种子光,输出为耗散孤子脉冲。当种子脉冲激光中心波长为1041 nm、放大器的增益光纤长度为8 m时,获得了较好的平坦宽光谱,波长范围为1040~1600 nm时,其平坦度约为10 dB,其中1040~1250 nm波长范围的宽光谱平坦度小于1.5 dB。

Conventional printer characterisation models are generally based on the assumption that the densities of primary colours are additive. However, additivity failure frequently occurs in practice. We propose a novel grey component replacement (GCR) method based on the spectral density sub-additivity equations in this letter for spectral characterisation of a 4-ink colour printer. The method effectively correct the error caused by additivity failure. Real high-quality hardcopy samples are produced as evidence of the feasibility of the proposed method and to evaluate the model performance. Finally, the GCR model for characterising colour printer with high spectral and colorimetric prediction accuracy is established.

A spectral-based 8-ink characterization model is developed to accurately predict the recipe for a multi-ink printer. The 8-ink color separation method is a union of five 3-ink and six 4-ink combinations based on the cellular Yule-Nielsen spectral Neugebauer model with a recipe selection strategy. The performance levels of the forward and backward models are evaluated for individual ink combinations using printed testing samples. Furthermore, the spectral-based method performs better compared with the XYZ-based approach. On the basis of the backward model performance, a novel fast recipe selection strategy is proposed and estimated.

The cellular Yule-Nielson spectral Neugebauer (CYNSN) model to characterize a typical CMYK (i.e., cyan, magenta, yellow, and black) 4-ink color printer is presented. By reconstructing spectral reflectance, models with high accuracy of spectral and colorimetric predictions are built. A novel cell-searching algorithm is proposed and used together with the iteration method to invert the cellular Neugebauer model efficiently. Large numbers of high quality hardcopy samples are produced to evaluate model performance and prove the feasibility of the algorithm. The spectral-based model performs better compared with the usual model based on CIE1931 XYZ tristimulus values.