1 State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics Engineering and Computer Science, and Center for Quantum Information Technology, Peking University, Beijing 100871, China; 2 School of Photoelectric Information, University of Electronic Science and Technology, Chengdu 611731, China; 3 College of Science, Guizhou University of Engineering Science, Bijie 551700, China; 4 National Institute of Metrology, Beijing 100029, China
Abstract We demonstrate an 852-nm external cavity diode laser (ECDL) system whose wavelength is mainly determined by an interference filter instead of other wavelength selective elements. The Lorentzian linewidth measured by the heterodyne beating between two identical lasers is 28.3 kHz. Moreover, we test the application of the ECDL in the Faraday atomic filter. Besides saturated absorption spectrum, the transmission spectrum of the Faraday atomic filter at 852 nm is measured by using the ECDL. This interference filter ECDL method can also be extended to other wavelengths and widen the application range of diode laser.
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 91436210) and the International Science and Technology Cooperation Program of China (Grant No. 2010DFR10900).
Surface relief resonant Brewster filters with multiple channels Ma Jian-Yong(麻健勇), Liu Shi-Jie(刘世杰), Zhang Da-Wei(张大伟), Yao Jian-Ke(姚建可), Xu Cheng(许程), Jin Yun-Xia(晋云霞), Shao Jian-Da(邵建达), and Fan Zheng-Xiu(范正修). Chin. Phys. B, 2008, 17(10): 3704-3707.
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.