chapter 19, Transceivers and Tunable Wavelength Transceiver Modules

In Part 5 Digital Transceivers Performance from: Digital and Analog Fiber Optic Communications for CATV and FTTx Applications

Author(s): Avigdor Brillant

Published: 10 June 2008

Chapter DOI: http://dx.doi.org/10.1117/3.732502.ch19

Chapter Page Count: 63 pages

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Front Matter

Part 1 System Overview
1. WDM, Fiber to the X, and HFC Systems: A Technical Review

2. Basic Structure of Optical Transceivers

3. Introduction to CATV Standards and Concepts of Operation

Part 2 Semiconductors and Passives
4. Introduction to Optical Fibers and Passive Optical Fiber Components

5. Optics, Modules, and Lenses

6. Semiconductor Laser Diode Fundamentals

7. Laser Dynamics: External Modulation for CATV and Fast Data Rates

8. Photodetectors

Part 3 RF and Control Concepts
9. Basic RF Definitions and IMD Effects on TV Picture

10. Introduction to Receiver Front-End Noise Modeling

11. Amplifier Analysis and Design Concepts

12. AGC Topologies and Concepts

13. Laser Power and Temperature Control Loops

Part 4 Introduction to CATV MODEM and Transmitters
14. Quadrature Amplitude Modulation (QAM) in CATV Optical Transmitters

15. Introduction to CATV MODEM

16. Linearization Techniques

17. System Link Budget Calculation and Impairment Aspects

Part 5 Digital Transceivers Performance
18. Introduction to Digital Data Signals and Design Constraints

19. Transceivers and Tunable Wavelength Transceiver Modules

Part 6 Integration and Testing
20. Cross-Talk Isolation

21. Test Setups

Back Matter

Preview

Chapter Contents

19.1 Burst Mode
19.2 Wavelength Lockers and Wavelength Control Loop
19.3 Transceiver Housing TOSA ROSA Structure and Integration
19.4 Main Points of this Chapter
References

Excerpt

In this chapter, digital transceiver structure is reviewed. The concept of digital transceivers has been briefly introduced in Sec. 2.4. However, in this section, detailed design considerations and design topologies of burst-mode control, modulation, heat dissipation, housing, transmit-optical subassembly (TOSA), and receiver-optical sub-assembly (ROSA) blocks' inside structure, and wavelength locker are explained. A preliminary review of digital transceiver design approaches is given in this chapter. Burst mode is reviewed in Sec. 19.1, a glance on tunable wavelength transmitters is provided in Sec. 19.2, and design approaches for transceiver integration into small form packages are dealt with in Sec. 19.3.

19.1 Burst Mode

In the continuing endeavor toward broadband networking and combined multimedia services such as interactive video, voice, and fast internet, the systems have become BW thirsty. Applications of voice-over-internet protocol (VOIP), high-definition-TV-over-internet protocol (HDTVOIP), and internet traffic have been increased. Hence, there is an increasing demand for broadband-access networks for FTTx and FTTC that can operate in time division multiple access (TDMA) bursts. The ethernet passive-optical network (EPON) is a prospective solution for very high data rate transport to the end user in the FTTx, FTTP, and FTTH configurations. A general architecture of an EPON is illustrated in Fig. 19.1. The main idea of this approach is to have multiple optical-network units (ONUs), which are connected to an optical-line terminal (OLT) through a single optical fiber and a tree network, which can be a star coupler of 1:N. The upstream is managed in time-division-multiplexing (TDM) technology. In this manner, each ONU has its own dedicated transmit time slot. ONUs are at the offices or homes on the user's end of the network. The OLT is the network central.

http://dx.doi.org/10.1117/3.732502.ch19

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