title: High sensitivity and resolution integrated optical system for portable Raman spectrometer.
abstract: An integrated optical system with high sensitivity and resolution was presented. This was made possible by coupling a probe to a monochromator directly, using an aspheric lens and an achromatic lens in the coupling path, using a dichroic filter with high transmission and a steep transitional zone as a beam splitter, increasing the throughput of the monochromator, and optimizing its structural parameters. This optical system has a high sensitivity; the tested spectrogram of a glass rod demonstrated that the signal-to-noise ratio measured by the integrated optical system was almost 4 times as high as an independent probe and monochromator. The optical system also has the advantages of high resolution (4  cm-1or 0.28 nm), low cost, and portable size. This work lays a good groundwork for the development of a high sensitivity, high resolution, and low cost integrated portable Raman spectrometer.
authors.forename: Ming
authors.initials: M
authors.lastname: Tang
authors.forename: Xin
authors.initials: X
authors.lastname: Wang
authors.forename: Fan
authors.initials: F
authors.lastname: Xianguang
authors.forename: Wei
authors.initials: W
authors.lastname: Li
authors.forename: Yingjie
authors.initials: Y
authors.lastname: Xu
authors.forename: Jing
authors.initials: J
authors.lastname: Que
authors.forename: Jian
authors.initials: J
authors.lastname: He
authors.forename: Yong
authors.initials: Y
authors.lastname: Zuo