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High-Speed Traveling-Wave Photodetector with a 3-dB Bandwidth of 410 GHz

  • Received : 2012.04.25
  • Accepted : 2012.07.27
  • Published : 2012.12.31

Abstract

A high-speed traveling-wave photodetector (TWPD) with an InGaAs absorber is designed and realized. The bandwidth of the TWPD is measured using electro-optic sampling techniques. The bandwidth is 410 GHz, which shows that the RC limitation is overcome. While the TWPD shows a low responsivity of 0.06 A/W at 1,550 nm, this value can be improved through further optimization of the structure without a sacrifice in bandwidth.

Acknowledgement

Supported by : National Research Foundation of Korea (NRF)

References

  1. K.S. Giboney, M.J.W. Rodwell, and J.E. Bowers, "Traveling- Wave Photodetector Theory," IEEE Trans. Microw. Theory Technol., vol. 45, no. 8, Aug. 1997, pp.1310-1319. https://doi.org/10.1109/22.618429
  2. P. Hill et al., "Measurement of Hole Velocity in N-Type InGaAs," Appl. Phys. Lett., vol. 50, no. 18, May 1987, pp. 1260-1262. https://doi.org/10.1063/1.97877
  3. J.-W. Park et al., "A 3 dB Bandwidth Analysis of Travelling- Wave Photomixers in a Terahertz Regime," submitted to Optics Express.
  4. H.F. Taylor et al., "Travelling Wave Photodetectors," Proc. SPIE Optoelectron. Signal Process. Phased Array Antennas II, 1990, p. 59.
  5. K.S. Giboney, M.J.W. Rodwell, and J.E. Bower, "Travelling- Wave Photodetectors," IEEE Photon. Technol. Lett., vol. 4, no. 12, Dec. 1992, pp. 1363-1365. https://doi.org/10.1109/68.180577
  6. K.S. Giboney et al., "Travelling-Wave Photodetectors with 172- GHz Bandwidth and 76-GHz Bandwidth-Efficiency Product," IEEE Photon. Technol. Lett., vol. 7, no. 4, Apr. 1995, pp. 412-414. https://doi.org/10.1109/68.376819
  7. V.M. Hietala et al., "Travelling-Wave Photodetectors for High- Power, Large-Bandwidth Applications," IEEE Trans. Microw. Theory Technol., vol. 43, no. 9, Sept. 1995, pp. 2291-2298. https://doi.org/10.1109/22.414580
  8. C.L. Goldsmith, G.A. Magel, and R.J. Baca, "Principles and Performance of Travelling-Wave Photodetector Array," IEEE Trans. Microw. Theory Technol., vol. 45, no. 8, Aug. 1997, pp. 1342-1350. https://doi.org/10.1109/22.618433
  9. J.-W. Park, "High-Responsivity and High-Speed Waveguide Photodiode with a Thin Absorption Region," IEEE Photon. Technol. Lett., vol. 22, no. 13, July 2010, pp. 975-977. https://doi.org/10.1109/LPT.2010.2048561