High spectral purity millimetre-wave modulated optical signal generation using fibre grating lasers

Timofeev, F.N.; Bennett, S.; Griffin, R.A.; Bayvel, Polina; Seeds, A.J.; Wyatt, R.; Kashyap, Raman; Robertson, M.J.

doi:10.1109/mwsym.1998.700594

Cited by 6 publications

(5 citation statements)

References 8 publications

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“…In these experiments, 68-Mb/s DPSK modulation was superimposed on the 12-GHz subharmonic reference signal, generating 68-Mb/s DPSK modulation at 36 GHz at the output of the OIPLL. The injection locking rate can be estimated from the noise suppression of the injection locking [10]. With the 240-MHz heterodyne linewidth of the lasers used, 107-dBc/Hz noise spectral density at 10-MHz offset corresponds to an injection locking rate of 1.4 GHz.…”

Section: Reference Modulated Linkmentioning

confidence: 99%

“…The limitation of this method is that the purity of the generated millimeter-wave signal is determined by the linewidth of the lasers used. Therefore, narrow linewidth lasers need to be used to produce beats of acceptable purity, such as solid state lasers [9] or external cavity fiber grating lasers [10]. For high spectral purity and absolute frequency stability, the phase fluctuations of the two lasers need to be correlated.…”

Section: Introductionmentioning

confidence: 99%

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Generation and transmission of millimeter-wave data-modulated optical signals using an optical injection phase-lock loop

Johansson

Seeds

2003

J. Lightwave Technol.

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103

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Generation and transmission of millimeter-wave data-modulated optical signals is presented using an optical injection phase-lock loop (OIPLL). Millimeter-wave signal generation is demonstrated with wide locking range, 30-GHz low phase noise level, 93 dBc/Hz, and a wide frequency tuning range, 4-60 GHz generation demonstrated using optical injection locking only, verified by using OIPLL in the 26-40 GHz range. The OIPLL is also used to transmit error-free 140-Mb/s amplitude shift keying and 68-Mb/s differential phase-shift keying (DPSK) modulated millimeter-wave signals over up to 65 km of uncompensated standard singlemode fiber. The DPSK system uses reference frequency modulation, eliminating the need for optical amplification.

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Section: Reference Modulated Linkmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Generation and transmission of millimeter-wave data-modulated optical signals using an optical injection phase-lock loop

Johansson

Seeds

2003

J. Lightwave Technol.

Self Cite

103

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“…However, most of them require tailored components (Wake et al 1995;Khawaja and Cryan 2010) or expensive high-speed optical modulators (Jia et al 2008;Ng'oma and Sauer 2009), which limit the maximum mm-wave frequency that can be achieved. An attractive alternative is the heterodyning of two lasers that are tuned to emit at frequencies that differ by the desired RF frequency (González-Insua et al 2010;Timofeev et al 1998). The main advantage of the heterodyne technique is its flexibility to tune the generated RF frequency over the entire microwave/mm-wave band by the use of electrical or thermal control, being limited by the photodetector (PD) bandwidth.…”

Section: Introductionmentioning

confidence: 99%

Impact of the mobile terminal scheme on millimeter-wave radio over fiber systems based on photonic heterodyning techniques

et al. 2017

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The use of communication networks relying on millimeter-wave (mm-wave) wireless links promises a great capacity enhancement as well as improved security. However, given the high-directivity of mm-wave links, coverage requirements are difficult to meet unless the network is assisted by an infrastructure. Given its low-cost, powerefficiency, and high capacity, radio over fiber has emerged as a strong candidate for the implementation of such infrastructure. Among the different generation techniques, photonic heterodyning has attracted considerable attention due to its capacity to generate radio frequency (RF) signals in the entire microwave/mm-wave range without requiring broadband electro-optical modulator. However, the RF signals generated using these techniques suffer from significant phase noise, a major impairment that degrades the system performance. In this paper we study two approaches to overcome this limitation: (1) the use of optical sideband injection locking (OSBIL) to generate tones with highly correlated phase noise and (2) heterodyning independent lasers in combination with a mobile terminal (MT) that is insensitive to the phase of the RF signal. A qualitative comparison between the two techniques in terms of MT sensitivity to the RF phase noise, the power sensitivity, and base station power efficiency leads to the conclusion that OSBIL is more & Ivan Aldaya

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“…Heterodyning the outputs of a directly modulated laser and a reference laser is a simple, cost-efficient, and integrable mm-wave OFDM generation technique [20]. It has been shown [21] that this approach is suitable to generate mm-wave onoff-keying (OOK) signals, but it is not clear if modulation formats with high peak-to-average power ratio (PAPR), such as OFDM, which are more sensitive to nonlinear distortion, can be generated using this technique. In addition, since the phases of the outputs of the lasers are uncorrelated, the phase noise of the resulting mmwave signal is the sum of the phase noises of both lasers.…”

Section: Introductionmentioning

confidence: 99%

Cost-efficient OFDM generation at 60-GHz by heterodyne technique with direct modulation and envelope detector

Aldaya

Gosset

Campuzano

et al. 2013

2013 15th International Conference on Transparent Optical Networks (ICTON)

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A cost-effective radio over fiber system to up-convert and transmit multigigabit signals at 60 GHz is presented. A low intermediate frequency OFDM signal is used to directly modulate a laser, which is combined with an independent unmodulated laser. The generated millimeter wave frequency can be adjusted by tuning the frequency separation between the lasers. Since no external modulator is required, this technique is low-cost and it is easily integrable in a single chip. In this paper, we present numerical results showing the feasibility of generating an IEEE 802.15.3c compliant 3.5-Gbps 60-GHz OFDM. We show that received signal quality is not limited by the lasers' linewidth but by the relative intensity noise. Keywords: Radio over fiber, OFDM, heterodyne detection. INTRODUCTIONThe use of millimeter-wave (mm-wave) bands has been proposed by many authors [1-4] as a solution for the increasing wireless bandwidth demand because of two main reasons: (i) the higher atmospheric and free-space path losses allow higher frequency reuse factor and, (ii) huge portions of the spectrum are still unlicensed worldwide [1,2]. However, migration to mm-wave frequencies results in higher number of base stations (BSs) and more complex and power consuming electronics [1]. Radio over fiber (RoF) has emerged as a cost-effective alternative to communicate mm-wave signals [5]. One of the challenges of RoF systems is the generation of the optical signal that after the photodetection results in the desired mm-wave signal. On the other hand, even if multipath effect in the wireless channel is reduced at mm-wave frequencies compared to lower bands [3], it still limits the maximum channel capacity, especially in non-line of sight communication, common in indoor networks. Because of that, high-bit rate wireless personal area network (WPAN) standards, operating in the band of 60 GHz, such as ECMA387 [6] and IEEE 802.15.3c [7], have adopted orthogonal frequency division multiplexing (OFDM) in their high capacity operation mode. In addition to robustness to multipath effect by simple equalization and inclusion of cyclic prefix (CP), OFDM offers high spectral efficiency and the possibility to adapt the modulation format of each subcarrier for the channel response.In recent years, a plethora of optical mm-wave generation techniques have been proposed to generate OFDM signals [8,9], especially in the frequency band around 60 GHz. Most of the reported optical generation techniques for upconversion of OFDM signals require external modulation [10][11][12][13][14][15], either an intensity modulator or phase modulator, whose cost increases as its bandwidth does. In order to relax the bandwidth requirements of the electro-optical component, as well as the frequency of the required electronics, frequency duplication has been proposed in [10,11] where a Match-Zehnder modulator (MZM) is biased at the null point, suppressing the optical carrier. A higher frequency multiplication scheme has been reported in [14] where a low bandwidth MZM is followed by a phase ...

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High spectral purity millimetre-wave modulated optical signal generation using fibre grating lasers

Cited by 6 publications

References 8 publications

Generation and transmission of millimeter-wave data-modulated optical signals using an optical injection phase-lock loop

Generation and transmission of millimeter-wave data-modulated optical signals using an optical injection phase-lock loop

Impact of the mobile terminal scheme on millimeter-wave radio over fiber systems based on photonic heterodyning techniques

Cost-efficient OFDM generation at 60-GHz by heterodyne technique with direct modulation and envelope detector

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