Vincent O'Byrne

FTTP deployments in the United States and Japan-equipment choices and service provider imperatives

This paper discusses the status of FTTP plans and deployment in the United States and in Japan. An overview of PON standards is provided, along with a discussion of video delivery over a PON network. The choice of a particular technical implementation for PON and video delivery is explained by equipment providers (AFC and Harmonic Inc.) and followed by a discussion of its deployment in Verizons service provider network. Finally, we review the history and status of FTTP deployments in Japan.

Multichannel AM video transmission using a high-power Nd:YAG laser and linearized external modulator

A high-power Nd:YAG laser with a linearized external modulator-based system is demonstrated for a transmission of 50 channels of vestigal sideband amplitude modulated (VSM AM) video. The 1320-nm diode-pumped Nd:YAG laser is an attractive source for AM video transmission due to the high output power ( approximately 200 mW) and low relative intensity noise ( >

Predistortion linearization of directly modulated DFB lasers and external modulators for AM video transmission

Multichannel AM video transmission systems place stringent requirements on the linearity of optical sources. Nonlinearity in the transfer function of directly modulated DFB lasers and external optical modulators produces intermodulation distortion products which limit the modulation index M which can be used. Since the SNR is proportional to M2 for shot-noise-limited AM video transmission, increasing M greatly improves system performance. The DFB lasers are limited primarily by second-order distortion products, while Mach-Zehnder modulators are limited by third-order distortion products.1 This paper describes predistortion techniques which reduce the dominant distortion of a DFB laser and external modulator by 12 and 14 dB, respectively, allowing a large increase in modulation index.

Passive optical network deployment in North America [Invited]

Feature Issue on Passive Optical Network Architectures and TechnologiesWe review the history of passive optical networking development and deployments in North America. The development of standards is discussed. We review early trials of passive optical network (PON) systems in North America, starting with A-PON, continuing with the current B-PON initiatives by Verizon and AT&T, and concluding with the initial view on G-PON emergence. Examples of how the fiber network is constructed in residential-focused B-PON deployments by AT&T and Verizon are shown. We provide several lessons learned. We conclude with a discussion of the various next-generation PON options under consideration in the industry forums and standards groups.

World's first XG-PON field trial

This paper describes the worlds first field trial of XG-PON, which can deliver 10 Gbps downstream and 2.5 Gbps upstream to residential or business customers, and confirmed XG-PONs co-existence with a commercially deployed G-PON system.

Verizon's fiber-to-the-premises and lessons learned

To make FTTP a reality, various architectural choices have to be made to make the technology, its adoption by the customer and its deployment cost effective. The paper reviews such decisions and outlines some of the lessons learned in the last six months that Verizon has deployed FTTP.This paper covers examples of lessons learned during the five years of Verizons FiOS and the need to continually be evolving in product and service offering to meet customers needs.

High-dynamic-range fiber optic link using external modulator diode pumped Nd:YAG lasers

Issues affecting the design of low noise high dynamic range analog fiber optic links are discussed. Particular attention is given to the implications of high optical power sources and low insertion loss external modulators for the achievable noise figure and dynamic range of such systems focusing on antenna remoting.

50 Channel VSB-AM Video Transmission Employing a Linearized External Modulator

The 1320 nm diode-pumped Nd: YAG laser is an attractive source for AM video transmission due to the high output power ( > 200 mW) and low RIN ( < −170 dB/Hz) over the video bandwidth. When used in conjunction with a predistortion-linearized Mach-Zehnder modulator [1] a 13.5 dB optical power budget is obtained for 50 channel transmission with video Carrier-to-Noise Ratios (CNR) of 52 dB and composite distortion products (CSO and CTB) less than −60 dBc. The demonstrated power budget is sufficient to allow 4 way power splitting with the remaining margin comparable to the best results obtained with DFB laser based AM transmission systems.

Fiber Access Deployment Lessons

This paper covers examples of lessons learned during the five years of Verizon’s FiOS and the need to continually be evolving in product and service offering to meet customer’s needs.

Optical decoding and coherent detection of a four-level FSK signal

A novel 4 level FSK technique for halving the number of transmitter lasers in a multichannel FSK system is described. This is accomplished by appropriately coding two independent binary signals into a 4 level FSK signal pnor to transmission. At the receiver the local oscillator optically decodes the signal prior to envelope detection. This scheme maintains the simplicity of a binary envelope detector and results in no system performance degradation over binary FSK.