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Journal of Lightwave Technology

Journal of Lightwave Technology


  • Vol. 22, Iss. 2 — Feb. 1, 2004
  • pp: 567–

100-GHz Spacing 8-Channel Light Source Integrated With External Cavity Lasers on Planar Lightwave Circuit Platform

Takuya Tanaka, Yoshinori Hibino, Toshikazu Hashimoto, Makato Abe, Ryoichi Kasahara, and Yuichi Tohmori

Journal of Lightwave Technology, Vol. 22, Issue 2, pp. 567- (2004)

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We have successfully fabricated a 100-GHz spacing 8-channel light source using hybrid integration technologies based on planar lightwave circuits (PLCs). The light source was composed of UV-written Bragg gratings and laser diode (LDs) on PLC platforms. To adjust the Bragg wavelength to the ITU-T grid, we used a precise phasemask with eight different pitches. Moreover,to suppress temperature-dependent mode hopping, we tuned the longitudinal mode wavelength so that it became stable by photosensitively modifying the waveguide refractive index in the cavity, which we achieved using an ArF excimer laser, in addition to inserting silicone in the cavity. As a result, we obtained eight lasing wavelengths controlled to those of the ITU-T grids and optical powers of more than 1.5 mW at an injection current of 80 mA without any temperature dependent mode hopping in the 8-channel light source. We also confirmed direct modulation at 2.5 Gb/s in every channel and we showed that we could modulate two adjacent channels simultaneously without any interference effect. These results show that the compact PLC-type integrated light source is promising for use in WDM systems.

© 2004 IEEE

Takuya Tanaka, Yoshinori Hibino, Toshikazu Hashimoto, Makato Abe, Ryoichi Kasahara, and Yuichi Tohmori, "100-GHz Spacing 8-Channel Light Source Integrated With External Cavity Lasers on Planar Lightwave Circuit Platform," J. Lightwave Technol. 22, 567- (2004)

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  1. C. E. Zah, M. R. Amersfoort, B. Pathak, F. Favire, P. S. D. Lin, N. C. Andreadakis, A. Rajhel, C. Caneau and M. A. Koza, "Wavelength accuracy and output power of multiwavelength DFB laser arrays with integrated star couplers and optical amplifiers", IEEE Photon. Technol. Lett., vol. 8, pp. 864 -866, 1996.
  2. C. R. Dorr, C. H. Joyner and L. W. Stulz, "Multifrequency laser with reduced intracavity wave mixing", IEEE Photon. Technol. Lett., vol. 11, pp. 635 -637, 1999.
  3. T. Van Canegem, D. Van Thourhout, M. Galarza, S. Verstuyft, I. Moerman, P. Van Daele, R. Baets, P. Demeester, C. G. P. Herben, X. J. M. Leijtens and M. K. Smit, "Monolithically integrated multi-wavelength laser by selective area growth with metal organic vapor epitaxy", Electron. Lett., vol. 37, no. 5, pp. 296-298, 2001.
  4. G. D. Maxwell, R. Kashyap, G. Sherlock, J. V. Collins and B. J. Ainslie, "Demonstration of a semiconductor external cavity laser using a UV written grating in a planar silica waveguide", Electron. Lett., vol. 30, no. 18, pp. 1486-1487, 1994 .
  5. T. Tanaka, H. Takahashi, M. Oguma, T. Hashimoto, Y. Hibino, Y. Yamada, Y. Itaya, J. Albert and K. O. Hill, "Integrated external cavity laser composed of spot-size converted LD and UV written grating in silica waveguide on Si", Electron. Lett., vol. 32, no. 13, pp. 1202-1203, 1996.
  6. M. Kawachi, "Silica waveguides on silicone and their application to integrated-optic components", Opt. Quantum Electron., vol. 22, pp. 391-416, 1990.
  7. B. Malo, J. Albert, K. O. Hill, F. Bilodeau, D. C. Johnson and S. Thériault, "Enhanced photosensitivity in lightly doped standard telecommunication fiber exposed to high fluence ArF excimer laser light", Electron. Lett., vol. 31, no. 11, pp. 879-880, 1995.
  8. Y. Yamada, S. Suzuki, K. Moriwaki, Y. Hibino, Y. Tohmori, Y. Akutsu, Y. Nakasuga, T. Hashimoto, H. Terui, M. Yanagisawa, Y. Inoue, Y. Akahori and R. Nagase, "Application of planar lightwave circuit platform to hybrid integrated optical WDM transmitter/receiver module", Electron. Lett., vol. 31, no. 16, pp. 1366-1367, 1995.
  9. H. Takahashi, T. Tanaka, Y. Akahori, T. Hashimoto, Y. Yamada and Y. Itaya, "A 2.5 Gb/s 4-channel multiwavelength light source composed of UV written waveguide grating and laser diodes integrated on Si", ECOC'97 (Edinburgh) Tech. Dig., vol. 3, no. WW4D, pp. 355-358, 1997.
  10. T. Tanaka, Y. Hibino, T. Hashimoto, R. Kasashara, M. Abe and Y. Tohmori, "Hybrid integrated external cavity laser without temperature dependent mode hopping", J. Lightwave. Technol., vol. 20, pp. 1730-1739, 2002.
  11. T. Tanaka, Y. Hibino, T. Hashimoto, M. Abe, R. Kasahara, M. Ishii, Y. Inoue and Y. Tohmori, "100 GHz-spacing 8-channel light source integrated with gratings and LD's on PLC platform", IEEE Photon. Technol. Lett., vol. 14, pp. 1348-1350, 2002.
  12. Y. Tohmori, Y. Suzaki, H. Oohashi, Y. Sakai, Y. Kondo, H. Okamoto, M. Okamoto, Y. Kadota, O. Mitomi, Y. Itaya and T. Sugie, "High temperature operation with low-loss coupling to fiber for narrow-beam 1.3. µ m lasers with butt-jointed selective grown spot-size converter", Electron. Lett., vol. 31, no. 21, pp. 1838-1840, 1995.
  13. T. Hashimoto, Y. Nakasuga, Y. Yamada, H. Terui, M. Yanagisawa, K. Moriwaki, Y. Suzaki, Y. Tohmori, Y. Sakai and H. Okamoto, "Hybrid integration of spot-size converted laser diode on planar lightwave circuit platform by passive alignment technique", IEEE Photon. Technol. Lett., vol. 8, no. 11, pp. 1504 -1506, 1996.
  14. R. Kashyap, Fiber Bragg Gratings, San Diego, CA: Academic, 1999, ch. 2.
  15. A. Othonos and K. Kalli, Fiber Bragg Gratings, Norwood, MA: Artech House, 1999, ch. 2.
  16. T. Tanaka, H. Takahashi, Y. Hibino, T. Hashimoto, A. Himeno, Y. Yamada and Y. Tohmori, "Hybrid external cavity lasers composed of spot-size converter integrated LD's and UV written Bragg gratings in a planar lightwave circuit on Si", IEICE Trans. Electron., vol. E83-C, no. 6, pp. 875-883, 2000.

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