Multioctave High Dynamic Range Up-Conversion Optical-Heterodyned Microwave Photonic Link

Wu, Yangzhe; Xie, Xiaobo; Hodiak, J.H.; Lord, Susan M.; Yu, Paul K. L.

doi:10.1109/lpt.2004.834454

Cited by 15 publications

(2 citation statements)

References 5 publications

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“…To synthesize the typical dual-mode optical carrier for the optical heterodyne MMWoF systems, the central-carrier suppressed double-sideband (CCS-DSB) optical carrier with high coherence feature is usually employed as representative candidate, which can be generated by externally modulating a continuous-wave (CW) laser with a nully-biased Mach-Zehnder modulator (MZM) 20 , 21 . The data-stream can be encoded onto the dual-mode optical carrier via the external modulation with an additional optical modulator 22 , 23 ; however, such an architecture relies on electro-optic double-sideband data modulation and suffers from chromatic dispersion induced power fading after fiber transmission 24 , 25 .…”

Section: Introductionmentioning

confidence: 99%

Long-reach 60-GHz MMWoF link with free-running laser diodes beating

Tsai

Lin

et al. 2018

Sci Rep

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With the remote beating of two mutually incoherent laser carriers, the local-oscillator-free long-reach millimeter-wave over fiber (MMWoF) link at 60-GHz band is demonstrated. The unique schemes of the proposed MMWoF are the wavelength-locked colorless laser diode (CLD) modulator, the mutually incoherent optical carrier for heterodyne MMW generation, and the square-law power envelope detection at receiving end. By directly encoding the single-mode with the CLD modulator, the single-carrier modulated QAM-OFDM data is achieved to release the RF power fading after fiber transmission. The mutually incoherent laser beating enables the optical heterodyne MMW generation with two independent optical carriers, which provides the advantages of local-oscillator-free operation and rules out the requirement of dual-mode optical carrier delivery from central office. At the wireless receiving end, the received QAM-OFDM data is self-down-converted to the baseband by employing the square-law power envelope detection. This eliminates the requirement of local oscillator and rules out the influence of the MMW carrier frequency fluctuation between two mutually incoherent lasers (used at central office and remote node), which effectively provides the MMW carrier immunity against the down-conversion instability caused by clock jitter or carrier incoherence. This architecture ensures the transmission of 16.5-Gbit/s 32-QAM OFDM data over 50 km in SMF and 3 m in free-space with the FEC certificated error vector magnitude of 12%, signal-to-noise ratio (SNR) of 18.4 dB, and bit error rate of 3.8 × 10−3. For multi-channel DWDM-PON applications, the proposed local-oscillator-free MMWoF link can successfully perform 11 DWDM channels of 32-QAM OFDM data access at 16.5 Gbit/s per channel via the wavelength controlling of the CLD modulation stage and the detuning of the beating carrier at remote node.

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Section: Introductionmentioning

confidence: 99%

Long-reach 60-GHz MMWoF link with free-running laser diodes beating

Tsai

Lin

et al. 2018

Sci Rep

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“…Optical generation of RF signals has been widely investigated towards various applications including broadband wireless access and sensor networks, software-defined radio, and wireless communications [1]. RF signals can be generated optically by employing harmonic generation through modulation of laser outputs [2][3][4] or by phase-locking of two laser outputs [5]. All-optical methods have also been explored, by use of optical injection locking of two lasers [6,7], or the beat signal from a dual-wavelength fiber laser [8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Multi-octave tunable RF signal generation based on a dual-polarization fiber grating laser

Tan¹,

Jin²,

Cheng³

et al. 2012

Opt. Express

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A simple technique has been proposed and demonstrated to generate radio-frequency (RF) signal based on a fiber grating laser with multi-octave tunablity. The laser is fabricated by inscribing a wavelength-matched Bragg grating pair in a short section of low-birefringence Er/Yb co-doped fiber. A RF signal can be obtained by beating the two-polarization mode output with its frequency determined by the birefringence within the cavity. By slicing the laser cavity into two sections and then aligning them with a rotated angle, the output beat frequency can be continuously tuned in a multi-octave frequency range as shown in the experiment from 2.05 GHz down to 289 MHz, as a result of the induced change in optical length for each polarization mode. The present technique has the advantages including simple scheme and large tuning range, and the ability of tuning could be further improved by use of active fibers with higher birefringence.

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