Optical carrier filtering for high dynamic range fibre optic links

LaGasse, M. J.; Charczenko, Walter; Hamilton, Michael C.; Thaniyavarn, Suwat

doi:10.1049/el:19941422

Cited by 90 publications

(36 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This compares well with the expected gain of 21.9 dB obtained using (5). A two-tone test using intermediate frequency (IF) input tones at 1.0 GHz and 980 MHz yielded the results shown in Fig.…”

Section: Resultssupporting

confidence: 75%

“…One of the optical carriers (Optical Carrier 1) is modulated by a LiNbO MZM biased at its null point and then combined with the second unmodulated carrier (Optical Carrier 2). Biasing an MZM near the null has been shown to increase the dynamic range of a photonic link [4], [5]. This is primarily due to decreasing the dc photocurrent and thus the noise floor.…”

Section: Discussionmentioning

confidence: 99%

“…With a small modulation depth consistent with the small signal approximation, larger RF power gain is possible for a given photocurrent and the same modulator in this link compared to intensity modulated direct detection (IM-DD) links with an MZM biased at quadrature. The second optical carrier power fixes the photocurrent but an optical power can be used to increase the gain in this scheme [see (5)]. In IM-DD links at quadrature, the gain is proportional to so increasing to increase the gain also increases the photocurrent.…”

Section: Discussionmentioning

confidence: 99%

“…The noise floor, SFDR, and RF gain of this link may be derived using (1) and (3) (4a) (4b) (5) where and are the modulated and unmodulated optical carrier powers, is the dc photocurrent and equals , and are the input and output resistances, respectively, is the bandwidth, and is the responsivity of the photodiode. These equations suggest that high gain and SFDR are possible by using a large first optical carrier power which is limited by the power handling of LiNbO modulators.…”

Section: Discussionmentioning

confidence: 99%

See 3 more Smart Citations

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

Xie

Hodiak³

et al. 2004

IEEE Photon. Technol. Lett.

View full text Add to dashboard Cite

Abstract-An up-converting microwave photonic link which enables high dynamic range over a multioctave information bandwidth is demonstrated. The improvement in spurious-free dynamic range (SFDR) as compared to conventional links is experimentally demonstrated. The link consists of two heterodyned lasers with one optical carrier modulated by a LiNbO 3 Mach-Zehnder modulator biased at the null point. This results in strong optical sidebands, minimum even order distortion, and more than 40-dB suppression of the optical carrier. The first carrier's two optical sidebands are heterodyned with the second unmodulated optical carrier. The modulated optical carrier is suppressed reducing noise power and enhancing SFDR. An SFDR of 115 dB/Hz 2 3 was measured. The detected local oscillator power is also suppressed, easing output filtering requirements.

show abstract

Section: Resultssupporting

confidence: 75%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

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

Xie

Hodiak³

et al. 2004

IEEE Photon. Technol. Lett.

View full text Add to dashboard Cite

show abstract

“…This technique is useful in systems where the modulation efficiency is limited and the overall optical power cannot be increased due to the danger of saturating the photodetector. Carrier reduction has so far been implemented via Brillouin scattering [4,5], use of dual-parallel Mach-Zehnder modulators [6] and external optical filtering using silica delay lines [7], Fabry-Perot structures [8], fiber Bragg gratings [9,10] and arrayed waveguide gratings (AWG) [11].…”

Section: Introductionmentioning

confidence: 99%

Variable carrier reduction in radio-over-fiber systems for increased modulation efficiency using a Si_3N_4 tunable extinction ratio ring resonator

Perentos¹,

Cuesta-Soto²,

Rodrigo³

et al. 2012

Opt. Express

View full text Add to dashboard Cite

Abstract:Variable optical carrier reduction via the use of a Si 3 N 4 ring resonator notch filter with tunable extinction ratio is demonstrated in a 10 GHz radio-over-fiber system for improving the modulation efficiency. The extinction of the filter notch is tuned with micro-heaters, by setting the Mach-Zehnder coupler of the ring. Experimental results showing a modulation depth improvement of up to 20 dB are provided.

show abstract