Abstract

The signal injection efficiency of electroabsorption modulator integrated lasers (EMLs) is improved to suit 10-Gb/s applications. For a typical EML module design with a conventionally designed 50-Ω signal feeder to meet the input return loss requirement for 10-Gb/s applications, a reduction in device capacitance of the electroabsorption modulator (EAM) section by 65% from its typical value is necessary. By optimizing the characteristic impedance of the signal feeder, the required 65% reduction in device capacitance of the EAM section is reduced to 45%, which would naturally lead to enhanced extinction ratio and optical output power. With the addition of a series 5-Ω thin-film resistor along the signal feeder, the device capacitance reduction of the EAM section is further reduced to approximately 33% of the typical value.

© 2006 IEEE

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  1. M. Aoki, M. Suzuki, H. Sano, T. Kawano, T. Ido, T. Taniwatari, K. Uomi, A. Takai, "InGaAs/InGaAsP MQW electro-absorption modulator integrated with a DFB laser fabricated by band-gap energy control selective area MOCVD," IEEE J. Quantum Electron. 29, 2088-2096 (1993).
  2. M. Aoki, N. Kikuchi, K. Sekine, S. Sasaki, M. Suzuki, T. Taniwatari, Y. Okuno, A. Takai, T. Kawano, "Low drive voltage and extremely low chirp integrated electroabsorption modulator/DFB laser for 2.5 Gb/s 200 km normal fibre transmission," Electron. Lett. 29, 1983-1984 (1993).
  3. E. Ishimura, Y. Miyazaki, K. Matsumoto, T. Takiguchi, T. Itagaki, D. Suzuki, K. Takagi, H. Higuchi, "Small chirp and wide bandwidth integrated modulator-laser at zero offset-bias operation," Proc. 11th Eur. Conf. Opt. Commun. (1997) pp. 171-174.
  4. Y. Miyazaki, H. Tada, T. Aoyagi, T. Nishimura, Y. Mitsui, "Extremely small-chirp electroabsorption-modulator integrated distributed feedback laser diode with a shallow quantum-well absorption layer," IEEE J. Quantum Electron. 38, 1075-1080 (2002).
  5. Y. D. Bae, B. K. Kang, B. Park, S. M. Lee, Y. H. Kim, H. K. Kim, M. K. Park, I. Kim, D. H. Jang, "Operation of 1550-nm electroabsorption-Modulated laser at 40 $^{\circ}\hbox{C}$ for 10-Gb/s, 40-km transmission," IEEE J. Sel. Topics Quantum Electron. 11, 135-140 (2005).
  6. K. Sato, S. Kuwahara, Y. Miyamoto, "Chirp characteristics of 40-Gb/s directly modulated distributed-feedback laser diodes," IEEE J. Lightw. Technol. 23, 3790-3797 (2005).
  7. D. M. Pozar, Microwave Engineering (Wiley, 2000).

Electron. Lett. (1)

M. Aoki, N. Kikuchi, K. Sekine, S. Sasaki, M. Suzuki, T. Taniwatari, Y. Okuno, A. Takai, T. Kawano, "Low drive voltage and extremely low chirp integrated electroabsorption modulator/DFB laser for 2.5 Gb/s 200 km normal fibre transmission," Electron. Lett. 29, 1983-1984 (1993).

IEEE J. Lightw. Technol. (1)

K. Sato, S. Kuwahara, Y. Miyamoto, "Chirp characteristics of 40-Gb/s directly modulated distributed-feedback laser diodes," IEEE J. Lightw. Technol. 23, 3790-3797 (2005).

IEEE J. Quantum Electron. (2)

M. Aoki, M. Suzuki, H. Sano, T. Kawano, T. Ido, T. Taniwatari, K. Uomi, A. Takai, "InGaAs/InGaAsP MQW electro-absorption modulator integrated with a DFB laser fabricated by band-gap energy control selective area MOCVD," IEEE J. Quantum Electron. 29, 2088-2096 (1993).

Y. Miyazaki, H. Tada, T. Aoyagi, T. Nishimura, Y. Mitsui, "Extremely small-chirp electroabsorption-modulator integrated distributed feedback laser diode with a shallow quantum-well absorption layer," IEEE J. Quantum Electron. 38, 1075-1080 (2002).

IEEE J. Sel. Topics Quantum Electron. (1)

Y. D. Bae, B. K. Kang, B. Park, S. M. Lee, Y. H. Kim, H. K. Kim, M. K. Park, I. Kim, D. H. Jang, "Operation of 1550-nm electroabsorption-Modulated laser at 40 $^{\circ}\hbox{C}$ for 10-Gb/s, 40-km transmission," IEEE J. Sel. Topics Quantum Electron. 11, 135-140 (2005).

Other (2)

E. Ishimura, Y. Miyazaki, K. Matsumoto, T. Takiguchi, T. Itagaki, D. Suzuki, K. Takagi, H. Higuchi, "Small chirp and wide bandwidth integrated modulator-laser at zero offset-bias operation," Proc. 11th Eur. Conf. Opt. Commun. (1997) pp. 171-174.

D. M. Pozar, Microwave Engineering (Wiley, 2000).

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