Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Rahat Ullah"'
Autor:
Sibghat Ullah, Rahat Ullah, Qi Zhang, Hafiz Ahmad Khalid, Kamran Ali Memon, Adil Khan, Feng Tian, Xin Xiangjun
Publikováno v:
IEEE Access, Vol 8, Pp 76692-76699 (2020)
In this paper, a new technique for generation of ultra-wide and flattened optical frequency comb (OFC) based on serial cascading of a phase modulator and dual-driven Lithium-Niobate Mach Zehnder modulator (DD-LiNbO3-MZM) is proposed. Over 60 carriers
Autor:
Bo Liu, Yongjun Wang, Ruoceng Zhang, Qi Zhang, Bingyan Wang, Qinghua Tian, Xiangjun Xin, Feng Tian, Rahat Ullah
Publikováno v:
Optics Communications. 445:222-230
Due to the inefficiency of the traditional multicarrier generation system, a double-band re-circulating frequency shifting (RFS) structure based on DP-MZM (Dual Parallel Mach–Zehnder modulator) is proposed. Contrary to the conventional single-sideb
Publikováno v:
Computer Applications in Engineering Education. 27:1299-1307
Publikováno v:
Photodiagnosis and Photodynamic Therapy. 24:286-291
We present the effectiveness of Raman spectroscopy (RS) in combination with machine learning for screening and analysis of blood sera collected from tuberculosis patients. Blood samples of 60 patients have confirmed active pulmonary tuberculosis and
Autor:
Xin Xiangjun, Feng Tian, Ibrar Ahmad, Rahat Ullah, Mao Yaya, Amjad Ali, Muhammad Saad Khan, Liu Bo
Publikováno v:
AEU - International Journal of Electronics and Communications. 94:322-331
The generation of optical frequency comb (OFC) with novel controlled delay circuit is presented in this study. The proposed OFC is based on a single laser source which is cascadingly connected with three modulators; all the modulators are tailored by
Autor:
Jianye Zhao, Yaya Mao, Shuaidong Chen, Bo Liu, Jing Ling, Rong Tang, Shun Han, Rahat Ullah, Mingye Li, Jianxin Ren
Publikováno v:
Optics letters. 45(17)
In this Letter, a novel five-dimensional (5D) data-iteration-based encryption model is proposed at physical layer for multi-wavelength optical frequency division multiplexing passive optical network (OFDM-PON) by using a hyperchaotic system. The prop
Publikováno v:
Applied optics. 59(12)
This paper presents experimental demonstration of an all-optical 3 R (re-amplification, re-shaping, re-timing) regeneration scheme for differential phase-shift keying (DPSK) signals, which consists of a clock recovery module and a phase-regeneration
Autor:
Minye Li, Shuaidong Chen, Bo Liu, Rahat Ullah, Shun Han, Delin Zhao, Xueyang Liu, Jingyi Zhang, Jianxin Ren, Lei Jiang, Jianye Zhao, Xiumin Song, Yaya Mao
Publikováno v:
Asia Communications and Photonics Conference/International Conference on Information Photonics and Optical Communications 2020 (ACP/IPOC).
A Rubik's cube rotation encryption based on chaos in three-dimensional carrier-free amplitude and phase modulation passive optical network (3D-CAP-PON) is proposed. Experiment verifies that the proposed scheme has good transmission performance and ex
Publikováno v:
IEEE Access, Vol 6, Pp 6183-6193 (2018)
A novel and cost effective optical multicarrier (OMC) generator is introduced in this article. OMC is generated by connecting three modulators in cascade with laser source, where laser is connected with one amplitude modulator and two Mach-Zehnder mo
Autor:
Yaya Mao, Yang Han, Mingye Li, Jianye Zhao, Shuaidong Chen, Bo Liu, Rong Tang, Jianxin Ren, Rahat Ullah, Xing Xu
Publikováno v:
Optics Communications. 495:127055
Optical access network security issues have become more prominent as the number of users and the desire for colossal network capacity increases dramatically. This paper proposes a secure method for data transmission by performing encryption at the ph