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ABSTRACT A unusual bidirectional low cost WDM-PON-ROF communication network architecture using optical sextuple frequency which is based on photoelectron coherent modulation through a Double-Arm-Mach-Zehnder-Modulator with a number of different wavelength characteristics is provided and analyzed theoretically. After transmitting more than 25 km in a standard single mode fiber, the clear eye-diagram and good bit error rate are obtained for wireless signal, wired signal and upstream signal communication. In this communication network architecture, because of no laser source, the base-station (BS) is not complicated, and because of the optical sextuple frequency signal, the ultra high frequency of the local oscillator is greatly reduced. Compared with recent schemes, the outlays of switching center and BS are greatly decreased. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2079-2083, 2015 [ABSTRACT FROM AUTHOR]

ABSTRACT We report the realization of a fiber sensor for simultaneous measurement of stress and temperature based on the integration of a fiber Bragg grating (FBG) and a micro external Fabry-Perot (F-P) cavity constructed with a thin film coated on a fiber end. The Bragg wavelength shift is used to measure stress while the wavelength shift of the F-P interference fringes is traced for determining the temperature, which can also compensate the thermal stress of FBG induced by temperature change. A temperature sensitivity of ∼0.2 nm/°C and a stress sensitivity of 8.11 × 10−3 nm/N with good stability can be achieved. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2440-2444, 2013 [ABSTRACT FROM AUTHOR]

In this article, we propose and demonstrate an orthogonal frequency division multiplexing-radio over fiber (OFDM-ROF) system based on three channels sextupling-frequency scheme using an external modulation of a distributed feedback laser diode (DFB-LD) and dual drive Mach-Zehnder modulator (DD-MZM) for carrying 100 GHz W-band frequency multiple-input multiple-output (MIMO)-OFDM signals with 90 Gbps downstream. MIMO-OFDM algorithms effectively compensate for impairments in the wireless link. Without using costly W-band components, a transmission system with 50 km single mode fiber (SMF) and 4 m wireless transmission operation at 100 GHz is experimentally validated. The power penalties for MIMO-OFDM signals of base stations are less than 3 dBm. For the upstream transmission, wavelength reuse with 30 Gbps 4QAM upstream signals is experimentally demonstrated. The minimum optical spectral gap between residue downstream OFDM band and upstream OFDM band that guarantees a tolerable amount of optical interference has been determined through experiment. The frequency of local oscillator is reduced due to frequency sextupling scheme. The cost of the proposed system is largely reduced. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:93-99, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27251 [ABSTRACT FROM AUTHOR]

Optical millimeter-wave (mm-wave) generation based on an external modulator is proposed and simulately demonstrated.Both theoretical analysis and simulation results reveal that doubling-frequency, quadrupling-frequency, sextupling-frequency, octupling-frequency, decupling-frequency, 12-fold-frequency, dual quadrupling-frequency, or dual octupling-frequency mm-waves can be generated in this scheme. The frequency of local oscillator signal is largely reduced because frequency octupling, frequency decupling, or frequency 12-fold mm-wave is generated. The overall cost of the system is largely reduced. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2902-;2907, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26432 [ABSTRACT FROM AUTHOR]