Abstract

A novel method for determining gain in long-cavity Fabry-Pérot diode lasers is presented. Gain is extracted from a return-loss measurement via a simple model. The experimental setup is based on the injection of a low-coherence probe signal into the laser cavity and synchronous detection of the reflected light. Using a fiber-optics setup, gain can be determined in commercial fiber-coupled laser modules. The novel technique is particularly suitable for diode lasers with very long cavities. To illustrate the method,the gain spectra of a 980-nm pump diode laser with 1800-µm cavity length are determined. Gain saturation due to probe signal injection is addressed.

© 2003 IEEE

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  1. B. W. Hakki and T. L. Paoli, "CW degradation at 300° K of GaAs double-heterostructure junction lasers. II. Electronic gain", J. Appl. Phys., vol. 44, no. 9, pp. 4113-4119, Sept. 1973.
  2. B. W. Hakki and T. L. Paoli, "Gain spectra in GaAs double-heterostructure injection lasers", J. Appl. Phys., vol. 46, no. 3, pp. 1299-1306, Mar. 1975.
  3. D. T. Cassidy, "Technique for measurement of the gain spectra of semiconductor diode lasers", J. Appl. Phys., vol. 56, no. 11, pp. 3096-3099, Dec. 1984.
  4. C. H. Henry, R. A. Logan and F. R. Merritt, "Measurement of gain and absorption spectra in AlGaAs buried heterostructure lasers", J. Appl. Phys., vol. 51, no. 6, pp. 3042-3050, June 1980.
  5. L. Wu and L. Fu, "Novel technique for the systematic measurement of gain, absolute refractive index spectra and other parameters of semiconductor lasers", IEEE J. Quantum Electron., vol. 36, pp. 721-727, June 2000 .
  6. B. E. Schmidt, S. Mohrdiek and C. S. Harder, "Pump laser diodes,"in Optical Fiber Telecommunications IV-A, I. P. Kaminov, and T. Li, Eds. San Diego: Academic, 2002, ch. 11.
  7. Y. Yamamoto, "Characteristics of AlGaAs Fabry-Perot cavity type laser amplifiers", IEEE J. Quantum Electron., vol. 16, pp. 1047-1052, Oct. 1980.
  8. T. Saitoh, Y. Suzuki and H. Tanaka, "Low noise characteristics of a GaAs-AlGaAs multiple-quantum-well semiconductor laser amplifier", IEEE Photon. Technol. Lett., vol. 2, pp. 794-796, Nov. 1990.
  9. K. Magari, S. Kondo, H. Yasaka, Y. Noguchi, T. Kataoka and O. Mikami, "A high-gain GRIN-SCH MQW optical semiconductor amplifier", IEEE Photon. Technol. Lett., vol. 2, pp. 792 -793, Nov. 1990.
  10. L. A. Coldren and S. W. Corzine, Diode Lasers and Photonic Integratic Circuits, New York: Wiley, 1995.
  11. G. P. Agrawal and N. K. Dutta, Semiconductor Lasers, 2nd ed. New York: Van Nostrand Reinhold, 1993.
  12. J. Troger, P.-A. Nicati, L. Thévenaz and Ph. A. Robert, "Novel measurement scheme for injection-locking experiments", IEEE J. Quantum Electron., vol. 35, pp. 32-38, Jan. 1999.

Other (12)

B. W. Hakki and T. L. Paoli, "CW degradation at 300° K of GaAs double-heterostructure junction lasers. II. Electronic gain", J. Appl. Phys., vol. 44, no. 9, pp. 4113-4119, Sept. 1973.

B. W. Hakki and T. L. Paoli, "Gain spectra in GaAs double-heterostructure injection lasers", J. Appl. Phys., vol. 46, no. 3, pp. 1299-1306, Mar. 1975.

D. T. Cassidy, "Technique for measurement of the gain spectra of semiconductor diode lasers", J. Appl. Phys., vol. 56, no. 11, pp. 3096-3099, Dec. 1984.

C. H. Henry, R. A. Logan and F. R. Merritt, "Measurement of gain and absorption spectra in AlGaAs buried heterostructure lasers", J. Appl. Phys., vol. 51, no. 6, pp. 3042-3050, June 1980.

L. Wu and L. Fu, "Novel technique for the systematic measurement of gain, absolute refractive index spectra and other parameters of semiconductor lasers", IEEE J. Quantum Electron., vol. 36, pp. 721-727, June 2000 .

B. E. Schmidt, S. Mohrdiek and C. S. Harder, "Pump laser diodes,"in Optical Fiber Telecommunications IV-A, I. P. Kaminov, and T. Li, Eds. San Diego: Academic, 2002, ch. 11.

Y. Yamamoto, "Characteristics of AlGaAs Fabry-Perot cavity type laser amplifiers", IEEE J. Quantum Electron., vol. 16, pp. 1047-1052, Oct. 1980.

T. Saitoh, Y. Suzuki and H. Tanaka, "Low noise characteristics of a GaAs-AlGaAs multiple-quantum-well semiconductor laser amplifier", IEEE Photon. Technol. Lett., vol. 2, pp. 794-796, Nov. 1990.

K. Magari, S. Kondo, H. Yasaka, Y. Noguchi, T. Kataoka and O. Mikami, "A high-gain GRIN-SCH MQW optical semiconductor amplifier", IEEE Photon. Technol. Lett., vol. 2, pp. 792 -793, Nov. 1990.

L. A. Coldren and S. W. Corzine, Diode Lasers and Photonic Integratic Circuits, New York: Wiley, 1995.

G. P. Agrawal and N. K. Dutta, Semiconductor Lasers, 2nd ed. New York: Van Nostrand Reinhold, 1993.

J. Troger, P.-A. Nicati, L. Thévenaz and Ph. A. Robert, "Novel measurement scheme for injection-locking experiments", IEEE J. Quantum Electron., vol. 35, pp. 32-38, Jan. 1999.

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