System for delivery of broadcast digital video as an overlay to baseband switched services on a fiber-to-the-home access network

Naresh Chand; Peter D. Magill; Venkat S. Swaminathan; R. D. Yadvish

doi:10.1117/12.347955

28 April 1999 System for delivery of broadcast digital video as an overlay to baseband switched services on a fiber-to-the-home access network

Naresh Chand, Peter D. Magill, Venkat S. Swaminathan, R. D. Yadvish

Author Affiliations +

Proceedings Volume 3666, International Conference on Fiber Optics and Photonics: Selected Papers from Photonics India '98; (1999) https://doi.org/10.1117/12.347955
Event: International Conference on Fiber Optics and Photonics: Selected Papers from Photonics India '98, 1998, New Delhi, India

Abstract

For low cost fiber-to-the-home (FTTH) passive optical networks (PON), we have studied the delivery of broadcast digital video as an overlay to baseband switched digital services on the same fiber using a single transmitter and a single receiver. We have multiplexed the baseband data at 155.52 Mbps with digital video QPSK channels in the 270 - 1450 MHz range with minimal degradation. We used an additional 860 MHz carrier modulated with 8 Mbps QPSK as a test-signal. An optical to electrical (O/E) receiver using an APD satisfies the power budget needs of ITU-T document G983.x for both class B and C operations (i.e., receiver sensitivity less than -33 dBm for a 10^-10 bit error rate) without any FEC for both data and video. The PIN diode O/E receiver nearly satisfies the need for class B operation (-30 dBm receiver sensitivity) of G983 with FEC in QPSK FDM video. For a 155.52 Mbps baseband data transmission and for a given bit error rate, there is approximately 6 dBo¹ optical power penalty due to video overlay. Of this, 1 dBo penalty is due to biasing the laser with an extinction ratio reduced from 10 dBo to approximately 6 dBo, and approximately 5 dBo penalty is due to receiver bandwidth increasing from approximately 100 MHz to approximately 1 GHz. The penalty due to receiver is after optimizing the filter for baseband data, and is caused by the reduced value of feedback resistor of the first stage transimpedance amplifier. The optical power penalty for video transmission is about 2 dBo due to reduced optical modulation index.

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Naresh Chand, Peter D. Magill, Venkat S. Swaminathan, and R. D. Yadvish "System for delivery of broadcast digital video as an overlay to baseband switched services on a fiber-to-the-home access network", Proc. SPIE 3666, International Conference on Fiber Optics and Photonics: Selected Papers from Photonics India '98, (28 April 1999); https://doi.org/10.1117/12.347955

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KEYWORDS

Video

Receivers

Fused deposition modeling

Time division multiplexing

Signal to noise ratio

PIN photodiodes

Avalanche photodetectors

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