title: [Improvement of grating spectrograph and its application to frequency-doubling in PPLN].
abstract: Charge-coupled device (CCD) has been widely used in spectral detection and spectral imaging fields, which has a number of benefits: broad spectral range response, low detection limit, wide dynamic range, minimal dark current and readout noise as well as the abilities of signal integration, simultaneous multichannel detection, and real-time detection. The combination of a traditional one meter grating spectrograph and a science charge-coupled device (CCD) led to a real-time grating spectrograph for laser spectrum detection developed in this paper. Based on the new grating spectrograph, the spectral characteristic of frequency-doubling of a broad band double-cladding fiber laser in polarized lithium niobate (PPLN) has been investigated. Dynamic spectrum of the second harmonic with varying temperature of PPLN has been observed and analyzed in detail.
authors.affiliation: Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Zhou
authors.forename: Qi-hong
authors.initials: QH
authors.lastname: Lou
authors.forename: Xiao-zheng
authors.initials: XZ
authors.lastname: Zhu
authors.forename: Jing-xing
authors.initials: JX
authors.lastname: Dong
authors.forename: Zhen-huan
authors.initials: ZH
authors.lastname: Ye
authors.forename: Yun-rong
authors.initials: YR
authors.lastname: Wei