Tailoring the dynamics of multisection lasers for 40 Gb/s direct modulation
We demonstrate theoretically how a proper tailoring of the longitudinal structure of multisection semiconductor laser help to achieve the required device performance when modulating current with 40 Gbit/s PRBS signal. For this reason we simulate and analyze the longitudinal dynamics with the software package LDSL-tool.
Optoelectronic devices : advanced simulation and analysis
1. Gain and Absorption: Many-Body Effects by S. W. Koch, J. Hader, A. Thranhardt, and J. V. Moloney 2. Fabry-Perot Lasers: Temperature and Many-Body Effects by B. Grote, E. K. Heller, R. Scarmozzino, J. Hader, J. V. Moloney, and S. W. Koch 3. Fabry-Perot Lasers: Thermodynamics-Based Modeling by U. Bandelow, H. Gajewski, and R. Hunlich 4. Distributed Feedback Lasers: Quasi-3D Static and Dynamic Model by X. Li 5. Multisection Lasers: Longitudinal Modes and their Dynamics by M. Radziunas and H. J. Wunsche 6. Wavelength Tunable Lasers: Time Domain Model for SG-DBR Lasers by D. Gallagher 7. Monolithic Mode-Locked Semiconductor Lasers by E. Avrutin , V. Nikolaev, and D. Gallagher 8. Vertical-Cavity Surface-Emitting Lasers: Single-Mode Control and Self-heating Effects by M. Streiff, W. Fichtner, and A. Witzig 9. Vertical-Cavity Surface-Emitting Lasers: High-Speed Performance and Analysis by J. Gustavsson, J. Bengtsson, and A. Larsson 10. GaN-based Light- Emitting Diodes by J. Piprek and S. Li 11. Silicon Solar Cells by P. Altermatt 12. Charge-Coupled Devices by C. J. Wordelman and E. K. Banghart 13. Infrared HgCdTe Optical Detectors by G. R. Jones, R. J. Jones, and W. French 14. Monolithic Wavelength Converters: Many-Body Effects and Saturation Analysis by J. Piprek, S. Li, P. Mensz, and J. Hader 15. Active Photonic Integrated Circuits by A. Lowery
DESIGN CONSIDERATION TO PPM KLYSTRONS FOR INDUSTRIAL LINAC
Toshiba has been developing the C-band and X-band Periodic Permanent Magnet (PPM) focused klystron in collaboration with KEK and manufactured prototypes for the JLC project. [1] The PPM klystron has an advantage to enhance the total efficiency as a result of eliminating the electric power for the focusing magnet. From experience on the development the PPM focused klystrons for the JLC project, we plan to apply the PPM focused klystron to the medical and industrial linac. The periodic magnet focusing scheme has some technical difficulties such as stop band voltage. To design the PPM klystron for the medical and industrial linac, it is necessary to give heed to electron beam instability; so that the tube parameters of the PPM focused klystrons have some constraints. The size of the accelerator system is substantially reduced if a PPM focused klystron is used. The majority of medical and industrial linacs use frequencies of S-band range. We discuss the availability of the S-band PPM focused klystron in this paper.