Low-phase-noise millimeter-wave generation at 64 GHz and data transmission using optical sideband injection locking

Braun, Ralf-Peter; Großkopf, G.; Rohde, D.; Schmidt, F.

doi:10.1109/68.669405

Cited by 145 publications

(37 citation statements)

References 5 publications

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“…In the experiment, optical LO signals are produced by the sideband injection-locking technique [9], where two of the sidebands produced by the directly modulated master laser at 10 GHz injection-lock two slave lasers, resulting in two dominant optical modes separated by 60 GHz as shown in the inset of Figure 1. When photo detected, low-noise and stable 60-GHz LO signals are obtained with a single-sideband phase noise of about Ϫ90 dBc/Hz at 100-kHz frequency offset in the RF-spectrum.…”

Section: Distribution Scheme and Resultsmentioning

confidence: 99%

60‐GHz radio‐on‐fiber distribution of 2 × 622 Mb/s WDM channels using remote photonic‐frequency upconversion

Seo

Choi

2003

Micro & Optical Tech Letters

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The feasibility of a novel DOA estimation algorithm for switchedbeam antenna systems based on power measurements has been demonstrated. Experimental results, carried out at 60 GHz, agree quite well with the simulated results and fast DOA estimations with reduced complexity are achieved, since no convergence time is required. Part I: Performance improvement, feasibility, and system considerations, Proc IEEE 85 (1997) . Broadband-radio-access systems require a large number of base stations due to their small cell size. The base stations should be compact and simple to implement. The usual approach to transmit MMW signals over fiber-optic links is to employ high-speed external modulators, which results in periodic signal-power suppression due to fiber chromatic dispersion [5]. One alternative approach is to send baseband or intermediate frequency (IF) data that are frequency upconverted at base stations. This approach is not only insensitive to fiber chromatic dispersion, but also is able to utilize wavelength division multiplexing (WDM) networks easily [6]. However, the base stations are more complex and expensive because high-frequency electrical mixers and local oscillator (LO) sources are needed for frequency upconversion.We have previously demonstrated efficient photonic-frequency upconversion of optical IF signals with optical LO signals using cross-gain modulation in a semiconductor optical amplifier (SOA) and square-law photo detection of a photo-diode (PD) [7,8]. We have shown that high conversion efficiencies can be obtained over the wide wavelength separation between optical IF and LO signals, as long as they are within the SOA optical-gain-wavelength bandwidth. DISTRIBUTION SCHEME AND RESULTSEmploying the abovementioned useful features, we experimentally demonstrate a new distribution scheme of two 622 Mb/s WDM channels in a 60-GHz radio-on-fiber (RoF) system. As shown in Figure 1, WDM data are wavelength-selectively distributed to base-stations and one 60-GHz optical LO is shared among base stations.The optical LO has two optical modes, which are separated by the desired LO frequency of f LO in order to avoid dispersion- induced signal suppression. In the experiment, optical LO signals are produced by the sideband injection-locking technique [9], where two of the sidebands produced by the directly modulated master laser at 10 GHz injection-lock two slave lasers, resulting in two dominant optical modes separated by 60 GHz as shown in the inset of Figure 1. When photo detected, low-noise and stable 60-GHz LO signals are obtained with a single-sideband phase noise of about Ϫ90 dBc/Hz at 100-kHz frequency offset in the RF-spectrum. Photonic-frequency upconversion of WDM data signals with optical LO signals is achieved remotely at the base stations, which eliminates the need for high-frequency electrical mixers and LO sources. Two WDM channels are realized by directly modulating two DFB lasers with a 622-Mb/s NRZ pseudo-random bit sequence and multiplexing with the 60-GHz optical LO signals of different wav...

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Section: Distribution Scheme and Resultsmentioning

confidence: 99%

60‐GHz radio‐on‐fiber distribution of 2 × 622 Mb/s WDM channels using remote photonic‐frequency upconversion

Seo

Choi

2003

Micro & Optical Tech Letters

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“…36, the subsequent heterodyne photo-detection of these high-power sidebands generates the high-fidelity upconverted RF signal appearing at ]N · f LO − f IF ] Hz. More explicitely, Optical Sideband Injection Locking (OSIL) facilitates the injection locking of the slave-lasers to higher-order optical sidebands, i.e to harmonics that are present within the output of the RF-modulated masterlaser [61], where the upconverted photodetected signals can be generated at [N · f LO ± f IF ] Hz with N being an integer.…”

Section: E Optical Injection Lockingmentioning

confidence: 99%

“…2007 Ackerman et al [59] Operated a MZM at an optical bias below the quadrature biasing point to increase the Signal to Noise Ratio (SNR). Braun et al [61] A 64 GHz, 140 -155 Mbps signal having a low phase noise <-100 dBc/Hz and a bit rate of was generated using Optical Sideband Injection Locking (OSIL). 2003 Johansson et al [62] A RF signal having a low phase noise and a data rate of 148 Mbps was generated Optical Injection Locking in the 26-40 GHz range using an Optical Injection Phase Lock Loop (OIPLL) for (OIL) transmission distances upto 65 Km.…”

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confidence: 99%

Performance Improvement and Cost Reduction Techniques for Radio Over Fiber Communications

Thomas

El‐Hajjar

Hanzo

2015

IEEE Commun. Surv. Tutorials

139

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Abstract-Advanced cost reduction and performance improvement techniques conceived for Radio Over Fiber (ROF) communications are considered. ROF techniques are expected to form the backbone of the future 5G generation of wireless networks. The achievable link performance and the associated deployement cost constitute the most salient metrics of a ROF architecture. In this paper, we commence by providing a rudimentary overview of the ROF architecture and then elaborate on ROF techniques designed for improving the attainable system performance. We conclude by describing the ROF techniques conceived for reducing the ROF system installation costs.

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“…The generation of millimeter-wave is the key technique of ROF system. Recently, lots of researches have been done in this aspect including direct modulation [1] of the laser, external modulation [2] and optical heterodyne modulation [3][4][5] . Phase modulation [6] is one kind of external modulation techniques.…”

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confidence: 99%

Simulation of mm-wave signal generation using phase modulation in ROF system

Zhang

Xin

et al. 2009

Optoelectron. Lett.

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The generation of optical millimeter waves via the improved phase modulator in a RoF system and the transmission character of the signal are theoretically investigated. A new phase modulating scheme is proposed, in which the sidebands are separated by wave length demultiplexer and one of them doesn't feed digital signals, thereby the phase wake-off is restrained.The broadband wireless telecommunication is becoming the main research aspect of the future telecommunication. ROF (radio over fiber) telecommunication technique combines optical fiber with the high frequency radio, thus the broadband wireless communications in 40-60 GHz access can be realized. The generation of millimeter-wave is the key technique of ROF system. Recently, lots of researches have been done in this aspect including direct modulation [1] of the laser, external modulation [2] and optical heterodyne modulation [3][4][5] . Phase modulation [6] is one kind of external modulation techniques. In such a system, there will be no need of bias voltage, complicated control circuits and the float current brought by the use of bias voltage, therefore, the phase modulation system can provide better robustness and simplified structure than traditional external intensity modulation method. In this paper a new phase modulation scheme is proposed based on the theoretical analysis and simulation.The principle of phase modulation is shown in Fig.1.We use the sinusoidal signal without attenuation to describe the signal source and optical light source applied to As shown in formula (1), the power of optical carrier will spread to first-order, second-order, third-order and other higher-order optical sidebands. The amplitude of each sideband is controlled by the parameter of bessel function. After the even harmonics conversion, the output of the phase modulator is described by formula (2),where C is a constant related to A c and the responsivity of the photodetector. After the subcarrier suppression by the FBG filter, the output signal of the filter can be described by formula (3),(1) the modulator. The output wavefront of the phase modulator can be described by formula (1) n m c n c out n t n J A t E 2 ) ( cos ) ( ) ( ) cos( ) ( 0 t J c .(3)

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Low-phase-noise millimeter-wave generation at 64 GHz and data transmission using optical sideband injection locking

Cited by 145 publications

References 5 publications

60‐GHz radio‐on‐fiber distribution of 2 × 622 Mb/s WDM channels using remote photonic‐frequency upconversion

60‐GHz radio‐on‐fiber distribution of 2 × 622 Mb/s WDM channels using remote photonic‐frequency upconversion

Performance Improvement and Cost Reduction Techniques for Radio Over Fiber Communications

Simulation of mm-wave signal generation using phase modulation in ROF system

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