Coding for stable transmission of W-band radio-over-fiber system using direct-beating of two independent lasers

Yang, Ling; Sung, J. Y.; Chow, Chi‐Wai; Yeh, Chien Hung; Cheng, Kur‐Ta; Shi, Jin Wei; Pan, Ci‐Ling

doi:10.1364/oe.22.026092

Cited by 5 publications

(3 citation statements)

References 17 publications

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“…In view of versatile approaches for dual wavelength applications, directly combining two independent CW lasers is the simplest way to generate the mutually incoherent dual-mode optical carrier, as which can arbitrarily adjust its mode spacing and wavelength by detuning either one 33 . Nevertheless, the currently proposed incoherent dual-mode carrier still requires an external modulator to encode the data.…”

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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“…Although the fiber-based access networks can provide huge bandwidths, issues still exist of how to distribute the bandwidths to different users flexibly and efficiently. Wireless signal distributions using wireless fidelity (WiFi) and radio-over-fiber (ROF) [6], [7] have been proposed. Recently, optical wireless communication using visible light, known as visible light communication (VLC) [8]- [12], has been considered as another promising means to distribute the wireless data.…”

Section: Introductionmentioning

confidence: 99%

Network Architecture of Bidirectional Visible Light Communication and Passive Optical Network

et al. 2016

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Network architectures to combine the fiber network outside the building and the visible light communication (VLC) access network inside the building are important for effectively distributing the high-capacity data to different users. In this paper, we propose a bidirectional network combining the VLC access network and the time-wavelength-division-multiplexed passive optical network (TWDM-PON). Orthogonal frequency division multiplexed modulation is used since it offers high spectral efficiency for both the TWDM-PON and the VLC access network. Low-cost phosphor-based white-light light-emitting diodes are (LEDs) used; hence, the VLC access network can combine with the lighting systems.

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“…These methods are inefficient and inflexible, because the passband window of an optical filter or an optical wavelength separator is fixed, and employing such devices to eliminate specific optical wavelength is inflexible; system performance cannot be ensured once the wavelength misalignment occurs. In parallel with the discussed schemes, employing direct-beating of two independent lasers to generate MMW signals are also developed [11], [12]. The central frequency of the generated MMW signal can be flexibly adjusted by modifying the wavelength spacing of the employed two lasers.…”

Section: Introductionmentioning

confidence: 99%

Hybrid OFDM and Radio-Over-Fiber Transport System Based on a Polarization Modulator

Chang

Peng

et al. 2015

IEEE Photonics J.

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A hybrid orthogonal frequency-division multiplexing (OFDM) and quadruplefrequency radio-over-fiber (RoF) transport system is developed based on colorless optical polarization beam splitters and an optical polarization-arrangement technique. No optical filter is required to eliminate any specific optical wavelength from the hybrid transport system; the employed optical wavelength and central carrier frequency of the transmitted radio-frequency signal can be dynamically adjusted without alerting the transmission performance of the proposed hybrid transport system. To prove the concept of the quadruple-frequency technique, a 40-GHz millimeter-wave (MMW) signal quadrupled from a 10-GHz signal is experimentally demonstrated in an optical domain. Its advancement is then employed to experimentally accomplish a hybrid OFDM and quadruple-frequency RoF signal transmission over a 25-km span of single-mode fiber. The advancement of the hybrid transport system is evaluated and demonstrated by error-free transmissions and clear eye and constellation diagrams. This proposed system is a great candidate for greatly reducing the cost of simultaneously transmitting OFDM and MMW signals over optical access networks and makes it more practical to be employed.

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Coding for stable transmission of W-band radio-over-fiber system using direct-beating of two independent lasers

Cited by 5 publications

References 17 publications

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

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

Network Architecture of Bidirectional Visible Light Communication and Passive Optical Network

Hybrid OFDM and Radio-Over-Fiber Transport System Based on a Polarization Modulator

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