Y. Boucher, “Non-reciprocal effects of complex-coupled distributed-feedback structures resulting from the phase difference between the coupling constants,” Opt. Commun. 136, 410–414 (1997).

J. Chen, A. Champagne, R. Maciejko, and T. Makino, “Improvement of single-mode gain margin in gain-coupled DFB lasers,” IEEE J. Quantum Electron. 33, 33–40 (1997).

Y. Boucher, O. Dellea, and J. Le Bihan, “Quasi-periodic complex-coupled distributed feedback structures with an exponential-like gradient of coupling,” IEEE J. Quantum Electron. 33, 2137–2145 (1997).

L. Poladian, “Resonance mode expansions and exact solutions for nonuniform gratings,” Phys. Rev. E 54, 2963–2975 (1996).

B. Jonsson, A. J. Lowery, H. Olesen, and B. Tromborg, “Instabilities and non-linear L-I characteristics in complex-coupled DFB lasers with antiphase gain and index gratings,” IEEE J. Quantum Electron. 32, 839–850 (1996).

K. Y. Kwon, “Effect of grating phase difference on single-mode yield in complex-coupled DFB lasers with gain and index gratings,” IEEE J. Quantum Electron. 32, 1937–1949 (1996).

D. A. Cardimona, M. P. Sharma, V. Kovanis, and A. Gavrielides, “Dephased index and gain coupling in distributed feedback lasers,” IEEE J. Quantum Electron. 31, 60–66 (1995).

F. Randone and I. Montrosset, “Analysis and simulation of gain-coupled distributed feedback semiconductor lasers,” IEEE J. Quantum Electron. 31, 1964–1973 (1995).

B. S. K. Lo and H. Ghafouri-Shiraz, “Spectral characteristics of DFB laser diodes with distributed coupling coefficient,” J. Lightwave Technol. 13, 200–212 (1995).

H. Olesen, J. Salzman, B. Jonsson, and B. Tromborg, “Single mode stability of DFB lasers with longitudinal Bragg detuning,” IEEE Photonics Technol. Lett. 7, 461–463 (1995).

J. Salzman, H. Olesen, A. Moller-Larsen, O. Albrektsen, J. Hanberg, J. Norregaard, B. Jonsson, and B. Tromborg, “Distributed feedback lasers with an S-bent waveguide for high-power single-mode operation,” IEEE J. Sel. Top. Quantum Electron. 1, 346–355 (1995).

L. M. Zhang, S. F. Yu, M. C. Nowell, D. D. Marcenac, J. E. Carroll, and R. G. S. Plumb, “Dynamic analysis of radiation side-mode suppression in a second-order DFB laser using time-domain large-signal traveling wave model,” IEEE J. Quantum Electron. 30, 1389–1395 (1994).

R. Bonello and I. Montrosset, “Analysis of multisection and multielectrode semiconductor lasers,” J. Lightwave Technol. 10, 1890–1900 (1992).

K. David, J. Buus, and R. G. Baets, “Basic analysis of AR-coated, partly gain-coupled DFB lasers: the standing wave effect,” IEEE J. Quantum Electron. 28, 427–433 (1992).

G. Morthier, P. Vankwikelberge, K. David, and R. Baets, “Improved performance of AR-coated DFB lasers by the introduction of gain-coupling,” IEEE Photonics Technol. Lett. 2, 170–172 (1990).

J. I. Kinoshita and K. Matsumoto, “Yield analysis of SLM DFB lasers with axially-flattened internal field,” IEEE J. Quantum Electron. 25, 1324–1332 (1989).

T. Kimura and A. Sugimura, “Coupled phase-shift DFB semiconductor lasers for narrow linewidth operation,” IEEE J. Quantum Electron. 25, 678–683 (1989).

J. E. Whiteaway, G. H. B. Thompson, A. J. Collar, and C. J. Armistead, “The design and assessment of λ/4 shifted DFB structures,” IEEE J. Quantum Electron. 25, 1261–1279 (1989).

S. Ogita, Y. Kotaki, H. Ishikawa, and H. Imai, “Optimum design for multiple phase shift distributed feedback laser,” Electron. Lett. 24, 731–732 (1988).

H. Soda, Y. Kotaki, H. Sudo, H. Ishikawa, S. Yamakoshi, and H. Imai, “Stability in single longitudinal mode operation in GaInAsP/InP phase-adjusted DFB lasers,” IEEE J. Quantum Electron. QE-23, 804–814 (1987).

H. Soda, K. Wakao, H. Sudo, T. Tanahashi, and H. Imai, “GaInAsP/InP phase-adjusted distributed feedback lasers with a step-like nonuniform stripe width structure,” Electron. Lett. 20, 1016–1018 (1984).

E. Kapon, A. Hardy, and A. Katzir, “The effect of complex coupling coefficients on distributed feedback lasers,” IEEE J. Quantum Electron. QE-18, 66–71 (1982).

W. Streifer, D. R. Scifres, and R. D. Burnham, “Coupled wave analysis of DFB and DBR lasers,” IEEE J. Quantum Electron. QE-13, 134–141 (1977).

H. Kogelnik and C. V. Shank, “Coupled wave theory of distributed feedback lasers,” J. Appl. Phys. 43, 2327–2335 (1972).

J. Salzman, H. Olesen, A. Moller-Larsen, O. Albrektsen, J. Hanberg, J. Norregaard, B. Jonsson, and B. Tromborg, “Distributed feedback lasers with an S-bent waveguide for high-power single-mode operation,” IEEE J. Sel. Top. Quantum Electron. 1, 346–355 (1995).

J. E. Whiteaway, G. H. B. Thompson, A. J. Collar, and C. J. Armistead, “The design and assessment of λ/4 shifted DFB structures,” IEEE J. Quantum Electron. 25, 1261–1279 (1989).

G. Morthier, P. Vankwikelberge, K. David, and R. Baets, “Improved performance of AR-coated DFB lasers by the introduction of gain-coupling,” IEEE Photonics Technol. Lett. 2, 170–172 (1990).

K. David, J. Buus, and R. G. Baets, “Basic analysis of AR-coated, partly gain-coupled DFB lasers: the standing wave effect,” IEEE J. Quantum Electron. 28, 427–433 (1992).

R. Bonello and I. Montrosset, “Analysis of multisection and multielectrode semiconductor lasers,” J. Lightwave Technol. 10, 1890–1900 (1992).

Y. Boucher, “Non-reciprocal effects of complex-coupled distributed-feedback structures resulting from the phase difference between the coupling constants,” Opt. Commun. 136, 410–414 (1997).

Y. Boucher, O. Dellea, and J. Le Bihan, “Quasi-periodic complex-coupled distributed feedback structures with an exponential-like gradient of coupling,” IEEE J. Quantum Electron. 33, 2137–2145 (1997).

W. Streifer, D. R. Scifres, and R. D. Burnham, “Coupled wave analysis of DFB and DBR lasers,” IEEE J. Quantum Electron. QE-13, 134–141 (1977).

K. David, J. Buus, and R. G. Baets, “Basic analysis of AR-coated, partly gain-coupled DFB lasers: the standing wave effect,” IEEE J. Quantum Electron. 28, 427–433 (1992).

D. A. Cardimona, M. P. Sharma, V. Kovanis, and A. Gavrielides, “Dephased index and gain coupling in distributed feedback lasers,” IEEE J. Quantum Electron. 31, 60–66 (1995).

L. M. Zhang, S. F. Yu, M. C. Nowell, D. D. Marcenac, J. E. Carroll, and R. G. S. Plumb, “Dynamic analysis of radiation side-mode suppression in a second-order DFB laser using time-domain large-signal traveling wave model,” IEEE J. Quantum Electron. 30, 1389–1395 (1994).

J. Chen, A. Champagne, R. Maciejko, and T. Makino, “Improvement of single-mode gain margin in gain-coupled DFB lasers,” IEEE J. Quantum Electron. 33, 33–40 (1997).

J. Chen, A. Champagne, R. Maciejko, and T. Makino, “Improvement of single-mode gain margin in gain-coupled DFB lasers,” IEEE J. Quantum Electron. 33, 33–40 (1997).

J. E. Whiteaway, G. H. B. Thompson, A. J. Collar, and C. J. Armistead, “The design and assessment of λ/4 shifted DFB structures,” IEEE J. Quantum Electron. 25, 1261–1279 (1989).

K. David, J. Buus, and R. G. Baets, “Basic analysis of AR-coated, partly gain-coupled DFB lasers: the standing wave effect,” IEEE J. Quantum Electron. 28, 427–433 (1992).

G. Morthier, P. Vankwikelberge, K. David, and R. Baets, “Improved performance of AR-coated DFB lasers by the introduction of gain-coupling,” IEEE Photonics Technol. Lett. 2, 170–172 (1990).

Y. Boucher, O. Dellea, and J. Le Bihan, “Quasi-periodic complex-coupled distributed feedback structures with an exponential-like gradient of coupling,” IEEE J. Quantum Electron. 33, 2137–2145 (1997).

D. A. Cardimona, M. P. Sharma, V. Kovanis, and A. Gavrielides, “Dephased index and gain coupling in distributed feedback lasers,” IEEE J. Quantum Electron. 31, 60–66 (1995).

B. S. K. Lo and H. Ghafouri-Shiraz, “Spectral characteristics of DFB laser diodes with distributed coupling coefficient,” J. Lightwave Technol. 13, 200–212 (1995).

J. Salzman, H. Olesen, A. Moller-Larsen, O. Albrektsen, J. Hanberg, J. Norregaard, B. Jonsson, and B. Tromborg, “Distributed feedback lasers with an S-bent waveguide for high-power single-mode operation,” IEEE J. Sel. Top. Quantum Electron. 1, 346–355 (1995).

E. Kapon, A. Hardy, and A. Katzir, “The effect of complex coupling coefficients on distributed feedback lasers,” IEEE J. Quantum Electron. QE-18, 66–71 (1982).

S. Ogita, Y. Kotaki, H. Ishikawa, and H. Imai, “Optimum design for multiple phase shift distributed feedback laser,” Electron. Lett. 24, 731–732 (1988).

H. Soda, Y. Kotaki, H. Sudo, H. Ishikawa, S. Yamakoshi, and H. Imai, “Stability in single longitudinal mode operation in GaInAsP/InP phase-adjusted DFB lasers,” IEEE J. Quantum Electron. QE-23, 804–814 (1987).

H. Soda, K. Wakao, H. Sudo, T. Tanahashi, and H. Imai, “GaInAsP/InP phase-adjusted distributed feedback lasers with a step-like nonuniform stripe width structure,” Electron. Lett. 20, 1016–1018 (1984).

S. Ogita, Y. Kotaki, H. Ishikawa, and H. Imai, “Optimum design for multiple phase shift distributed feedback laser,” Electron. Lett. 24, 731–732 (1988).

H. Soda, Y. Kotaki, H. Sudo, H. Ishikawa, S. Yamakoshi, and H. Imai, “Stability in single longitudinal mode operation in GaInAsP/InP phase-adjusted DFB lasers,” IEEE J. Quantum Electron. QE-23, 804–814 (1987).

B. Jonsson, A. J. Lowery, H. Olesen, and B. Tromborg, “Instabilities and non-linear L-I characteristics in complex-coupled DFB lasers with antiphase gain and index gratings,” IEEE J. Quantum Electron. 32, 839–850 (1996).

J. Salzman, H. Olesen, A. Moller-Larsen, O. Albrektsen, J. Hanberg, J. Norregaard, B. Jonsson, and B. Tromborg, “Distributed feedback lasers with an S-bent waveguide for high-power single-mode operation,” IEEE J. Sel. Top. Quantum Electron. 1, 346–355 (1995).

H. Olesen, J. Salzman, B. Jonsson, and B. Tromborg, “Single mode stability of DFB lasers with longitudinal Bragg detuning,” IEEE Photonics Technol. Lett. 7, 461–463 (1995).

E. Kapon, A. Hardy, and A. Katzir, “The effect of complex coupling coefficients on distributed feedback lasers,” IEEE J. Quantum Electron. QE-18, 66–71 (1982).

E. Kapon, A. Hardy, and A. Katzir, “The effect of complex coupling coefficients on distributed feedback lasers,” IEEE J. Quantum Electron. QE-18, 66–71 (1982).

T. Kimura and A. Sugimura, “Coupled phase-shift DFB semiconductor lasers for narrow linewidth operation,” IEEE J. Quantum Electron. 25, 678–683 (1989).

J. I. Kinoshita and K. Matsumoto, “Yield analysis of SLM DFB lasers with axially-flattened internal field,” IEEE J. Quantum Electron. 25, 1324–1332 (1989).

H. Kogelnik and C. V. Shank, “Coupled wave theory of distributed feedback lasers,” J. Appl. Phys. 43, 2327–2335 (1972).

S. Ogita, Y. Kotaki, H. Ishikawa, and H. Imai, “Optimum design for multiple phase shift distributed feedback laser,” Electron. Lett. 24, 731–732 (1988).

H. Soda, Y. Kotaki, H. Sudo, H. Ishikawa, S. Yamakoshi, and H. Imai, “Stability in single longitudinal mode operation in GaInAsP/InP phase-adjusted DFB lasers,” IEEE J. Quantum Electron. QE-23, 804–814 (1987).

D. A. Cardimona, M. P. Sharma, V. Kovanis, and A. Gavrielides, “Dephased index and gain coupling in distributed feedback lasers,” IEEE J. Quantum Electron. 31, 60–66 (1995).

K. Y. Kwon, “Effect of grating phase difference on single-mode yield in complex-coupled DFB lasers with gain and index gratings,” IEEE J. Quantum Electron. 32, 1937–1949 (1996).

Y. Boucher, O. Dellea, and J. Le Bihan, “Quasi-periodic complex-coupled distributed feedback structures with an exponential-like gradient of coupling,” IEEE J. Quantum Electron. 33, 2137–2145 (1997).

B. S. K. Lo and H. Ghafouri-Shiraz, “Spectral characteristics of DFB laser diodes with distributed coupling coefficient,” J. Lightwave Technol. 13, 200–212 (1995).

B. Jonsson, A. J. Lowery, H. Olesen, and B. Tromborg, “Instabilities and non-linear L-I characteristics in complex-coupled DFB lasers with antiphase gain and index gratings,” IEEE J. Quantum Electron. 32, 839–850 (1996).

J. Chen, A. Champagne, R. Maciejko, and T. Makino, “Improvement of single-mode gain margin in gain-coupled DFB lasers,” IEEE J. Quantum Electron. 33, 33–40 (1997).

J. Chen, A. Champagne, R. Maciejko, and T. Makino, “Improvement of single-mode gain margin in gain-coupled DFB lasers,” IEEE J. Quantum Electron. 33, 33–40 (1997).

L. M. Zhang, S. F. Yu, M. C. Nowell, D. D. Marcenac, J. E. Carroll, and R. G. S. Plumb, “Dynamic analysis of radiation side-mode suppression in a second-order DFB laser using time-domain large-signal traveling wave model,” IEEE J. Quantum Electron. 30, 1389–1395 (1994).

J. I. Kinoshita and K. Matsumoto, “Yield analysis of SLM DFB lasers with axially-flattened internal field,” IEEE J. Quantum Electron. 25, 1324–1332 (1989).

J. Salzman, H. Olesen, A. Moller-Larsen, O. Albrektsen, J. Hanberg, J. Norregaard, B. Jonsson, and B. Tromborg, “Distributed feedback lasers with an S-bent waveguide for high-power single-mode operation,” IEEE J. Sel. Top. Quantum Electron. 1, 346–355 (1995).

F. Randone and I. Montrosset, “Analysis and simulation of gain-coupled distributed feedback semiconductor lasers,” IEEE J. Quantum Electron. 31, 1964–1973 (1995).

R. Bonello and I. Montrosset, “Analysis of multisection and multielectrode semiconductor lasers,” J. Lightwave Technol. 10, 1890–1900 (1992).

G. Morthier, P. Vankwikelberge, K. David, and R. Baets, “Improved performance of AR-coated DFB lasers by the introduction of gain-coupling,” IEEE Photonics Technol. Lett. 2, 170–172 (1990).

J. Salzman, H. Olesen, A. Moller-Larsen, O. Albrektsen, J. Hanberg, J. Norregaard, B. Jonsson, and B. Tromborg, “Distributed feedback lasers with an S-bent waveguide for high-power single-mode operation,” IEEE J. Sel. Top. Quantum Electron. 1, 346–355 (1995).

L. M. Zhang, S. F. Yu, M. C. Nowell, D. D. Marcenac, J. E. Carroll, and R. G. S. Plumb, “Dynamic analysis of radiation side-mode suppression in a second-order DFB laser using time-domain large-signal traveling wave model,” IEEE J. Quantum Electron. 30, 1389–1395 (1994).

S. Ogita, Y. Kotaki, H. Ishikawa, and H. Imai, “Optimum design for multiple phase shift distributed feedback laser,” Electron. Lett. 24, 731–732 (1988).

B. Jonsson, A. J. Lowery, H. Olesen, and B. Tromborg, “Instabilities and non-linear L-I characteristics in complex-coupled DFB lasers with antiphase gain and index gratings,” IEEE J. Quantum Electron. 32, 839–850 (1996).

J. Salzman, H. Olesen, A. Moller-Larsen, O. Albrektsen, J. Hanberg, J. Norregaard, B. Jonsson, and B. Tromborg, “Distributed feedback lasers with an S-bent waveguide for high-power single-mode operation,” IEEE J. Sel. Top. Quantum Electron. 1, 346–355 (1995).

H. Olesen, J. Salzman, B. Jonsson, and B. Tromborg, “Single mode stability of DFB lasers with longitudinal Bragg detuning,” IEEE Photonics Technol. Lett. 7, 461–463 (1995).

L. M. Zhang, S. F. Yu, M. C. Nowell, D. D. Marcenac, J. E. Carroll, and R. G. S. Plumb, “Dynamic analysis of radiation side-mode suppression in a second-order DFB laser using time-domain large-signal traveling wave model,” IEEE J. Quantum Electron. 30, 1389–1395 (1994).

L. Poladian, “Resonance mode expansions and exact solutions for nonuniform gratings,” Phys. Rev. E 54, 2963–2975 (1996).

F. Randone and I. Montrosset, “Analysis and simulation of gain-coupled distributed feedback semiconductor lasers,” IEEE J. Quantum Electron. 31, 1964–1973 (1995).

J. Salzman, H. Olesen, A. Moller-Larsen, O. Albrektsen, J. Hanberg, J. Norregaard, B. Jonsson, and B. Tromborg, “Distributed feedback lasers with an S-bent waveguide for high-power single-mode operation,” IEEE J. Sel. Top. Quantum Electron. 1, 346–355 (1995).

H. Olesen, J. Salzman, B. Jonsson, and B. Tromborg, “Single mode stability of DFB lasers with longitudinal Bragg detuning,” IEEE Photonics Technol. Lett. 7, 461–463 (1995).

W. Streifer, D. R. Scifres, and R. D. Burnham, “Coupled wave analysis of DFB and DBR lasers,” IEEE J. Quantum Electron. QE-13, 134–141 (1977).

H. Kogelnik and C. V. Shank, “Coupled wave theory of distributed feedback lasers,” J. Appl. Phys. 43, 2327–2335 (1972).

D. A. Cardimona, M. P. Sharma, V. Kovanis, and A. Gavrielides, “Dephased index and gain coupling in distributed feedback lasers,” IEEE J. Quantum Electron. 31, 60–66 (1995).

H. Soda, Y. Kotaki, H. Sudo, H. Ishikawa, S. Yamakoshi, and H. Imai, “Stability in single longitudinal mode operation in GaInAsP/InP phase-adjusted DFB lasers,” IEEE J. Quantum Electron. QE-23, 804–814 (1987).

H. Soda, K. Wakao, H. Sudo, T. Tanahashi, and H. Imai, “GaInAsP/InP phase-adjusted distributed feedback lasers with a step-like nonuniform stripe width structure,” Electron. Lett. 20, 1016–1018 (1984).

W. Streifer, D. R. Scifres, and R. D. Burnham, “Coupled wave analysis of DFB and DBR lasers,” IEEE J. Quantum Electron. QE-13, 134–141 (1977).

H. Soda, Y. Kotaki, H. Sudo, H. Ishikawa, S. Yamakoshi, and H. Imai, “Stability in single longitudinal mode operation in GaInAsP/InP phase-adjusted DFB lasers,” IEEE J. Quantum Electron. QE-23, 804–814 (1987).

H. Soda, K. Wakao, H. Sudo, T. Tanahashi, and H. Imai, “GaInAsP/InP phase-adjusted distributed feedback lasers with a step-like nonuniform stripe width structure,” Electron. Lett. 20, 1016–1018 (1984).

T. Kimura and A. Sugimura, “Coupled phase-shift DFB semiconductor lasers for narrow linewidth operation,” IEEE J. Quantum Electron. 25, 678–683 (1989).

H. Soda, K. Wakao, H. Sudo, T. Tanahashi, and H. Imai, “GaInAsP/InP phase-adjusted distributed feedback lasers with a step-like nonuniform stripe width structure,” Electron. Lett. 20, 1016–1018 (1984).

J. E. Whiteaway, G. H. B. Thompson, A. J. Collar, and C. J. Armistead, “The design and assessment of λ/4 shifted DFB structures,” IEEE J. Quantum Electron. 25, 1261–1279 (1989).

B. Jonsson, A. J. Lowery, H. Olesen, and B. Tromborg, “Instabilities and non-linear L-I characteristics in complex-coupled DFB lasers with antiphase gain and index gratings,” IEEE J. Quantum Electron. 32, 839–850 (1996).

H. Olesen, J. Salzman, B. Jonsson, and B. Tromborg, “Single mode stability of DFB lasers with longitudinal Bragg detuning,” IEEE Photonics Technol. Lett. 7, 461–463 (1995).

J. Salzman, H. Olesen, A. Moller-Larsen, O. Albrektsen, J. Hanberg, J. Norregaard, B. Jonsson, and B. Tromborg, “Distributed feedback lasers with an S-bent waveguide for high-power single-mode operation,” IEEE J. Sel. Top. Quantum Electron. 1, 346–355 (1995).

G. Morthier, P. Vankwikelberge, K. David, and R. Baets, “Improved performance of AR-coated DFB lasers by the introduction of gain-coupling,” IEEE Photonics Technol. Lett. 2, 170–172 (1990).

H. Soda, K. Wakao, H. Sudo, T. Tanahashi, and H. Imai, “GaInAsP/InP phase-adjusted distributed feedback lasers with a step-like nonuniform stripe width structure,” Electron. Lett. 20, 1016–1018 (1984).

J. E. Whiteaway, G. H. B. Thompson, A. J. Collar, and C. J. Armistead, “The design and assessment of λ/4 shifted DFB structures,” IEEE J. Quantum Electron. 25, 1261–1279 (1989).

H. Soda, Y. Kotaki, H. Sudo, H. Ishikawa, S. Yamakoshi, and H. Imai, “Stability in single longitudinal mode operation in GaInAsP/InP phase-adjusted DFB lasers,” IEEE J. Quantum Electron. QE-23, 804–814 (1987).

L. M. Zhang, S. F. Yu, M. C. Nowell, D. D. Marcenac, J. E. Carroll, and R. G. S. Plumb, “Dynamic analysis of radiation side-mode suppression in a second-order DFB laser using time-domain large-signal traveling wave model,” IEEE J. Quantum Electron. 30, 1389–1395 (1994).

L. M. Zhang, S. F. Yu, M. C. Nowell, D. D. Marcenac, J. E. Carroll, and R. G. S. Plumb, “Dynamic analysis of radiation side-mode suppression in a second-order DFB laser using time-domain large-signal traveling wave model,” IEEE J. Quantum Electron. 30, 1389–1395 (1994).

S. Ogita, Y. Kotaki, H. Ishikawa, and H. Imai, “Optimum design for multiple phase shift distributed feedback laser,” Electron. Lett. 24, 731–732 (1988).

H. Soda, K. Wakao, H. Sudo, T. Tanahashi, and H. Imai, “GaInAsP/InP phase-adjusted distributed feedback lasers with a step-like nonuniform stripe width structure,” Electron. Lett. 20, 1016–1018 (1984).

E. Kapon, A. Hardy, and A. Katzir, “The effect of complex coupling coefficients on distributed feedback lasers,” IEEE J. Quantum Electron. QE-18, 66–71 (1982).

J. I. Kinoshita and K. Matsumoto, “Yield analysis of SLM DFB lasers with axially-flattened internal field,” IEEE J. Quantum Electron. 25, 1324–1332 (1989).

H. Soda, Y. Kotaki, H. Sudo, H. Ishikawa, S. Yamakoshi, and H. Imai, “Stability in single longitudinal mode operation in GaInAsP/InP phase-adjusted DFB lasers,” IEEE J. Quantum Electron. QE-23, 804–814 (1987).

J. E. Whiteaway, G. H. B. Thompson, A. J. Collar, and C. J. Armistead, “The design and assessment of λ/4 shifted DFB structures,” IEEE J. Quantum Electron. 25, 1261–1279 (1989).

T. Kimura and A. Sugimura, “Coupled phase-shift DFB semiconductor lasers for narrow linewidth operation,” IEEE J. Quantum Electron. 25, 678–683 (1989).

K. David, J. Buus, and R. G. Baets, “Basic analysis of AR-coated, partly gain-coupled DFB lasers: the standing wave effect,” IEEE J. Quantum Electron. 28, 427–433 (1992).

F. Randone and I. Montrosset, “Analysis and simulation of gain-coupled distributed feedback semiconductor lasers,” IEEE J. Quantum Electron. 31, 1964–1973 (1995).

B. Jonsson, A. J. Lowery, H. Olesen, and B. Tromborg, “Instabilities and non-linear L-I characteristics in complex-coupled DFB lasers with antiphase gain and index gratings,” IEEE J. Quantum Electron. 32, 839–850 (1996).

J. Chen, A. Champagne, R. Maciejko, and T. Makino, “Improvement of single-mode gain margin in gain-coupled DFB lasers,” IEEE J. Quantum Electron. 33, 33–40 (1997).

W. Streifer, D. R. Scifres, and R. D. Burnham, “Coupled wave analysis of DFB and DBR lasers,” IEEE J. Quantum Electron. QE-13, 134–141 (1977).

L. M. Zhang, S. F. Yu, M. C. Nowell, D. D. Marcenac, J. E. Carroll, and R. G. S. Plumb, “Dynamic analysis of radiation side-mode suppression in a second-order DFB laser using time-domain large-signal traveling wave model,” IEEE J. Quantum Electron. 30, 1389–1395 (1994).

D. A. Cardimona, M. P. Sharma, V. Kovanis, and A. Gavrielides, “Dephased index and gain coupling in distributed feedback lasers,” IEEE J. Quantum Electron. 31, 60–66 (1995).

K. Y. Kwon, “Effect of grating phase difference on single-mode yield in complex-coupled DFB lasers with gain and index gratings,” IEEE J. Quantum Electron. 32, 1937–1949 (1996).

Y. Boucher, O. Dellea, and J. Le Bihan, “Quasi-periodic complex-coupled distributed feedback structures with an exponential-like gradient of coupling,” IEEE J. Quantum Electron. 33, 2137–2145 (1997).

J. Salzman, H. Olesen, A. Moller-Larsen, O. Albrektsen, J. Hanberg, J. Norregaard, B. Jonsson, and B. Tromborg, “Distributed feedback lasers with an S-bent waveguide for high-power single-mode operation,” IEEE J. Sel. Top. Quantum Electron. 1, 346–355 (1995).

H. Olesen, J. Salzman, B. Jonsson, and B. Tromborg, “Single mode stability of DFB lasers with longitudinal Bragg detuning,” IEEE Photonics Technol. Lett. 7, 461–463 (1995).

G. Morthier, P. Vankwikelberge, K. David, and R. Baets, “Improved performance of AR-coated DFB lasers by the introduction of gain-coupling,” IEEE Photonics Technol. Lett. 2, 170–172 (1990).

H. Kogelnik and C. V. Shank, “Coupled wave theory of distributed feedback lasers,” J. Appl. Phys. 43, 2327–2335 (1972).

B. S. K. Lo and H. Ghafouri-Shiraz, “Spectral characteristics of DFB laser diodes with distributed coupling coefficient,” J. Lightwave Technol. 13, 200–212 (1995).

R. Bonello and I. Montrosset, “Analysis of multisection and multielectrode semiconductor lasers,” J. Lightwave Technol. 10, 1890–1900 (1992).

Y. Boucher, “Non-reciprocal effects of complex-coupled distributed-feedback structures resulting from the phase difference between the coupling constants,” Opt. Commun. 136, 410–414 (1997).

L. Poladian, “Resonance mode expansions and exact solutions for nonuniform gratings,” Phys. Rev. E 54, 2963–2975 (1996).

G. P. Agrawal and N. K. Dutta, Long Wavelength Semiconductor Lasers (Van Nostrand Reinhold, New York, 1986).

T. Fessant and J. Le Bihan, “Analysis of the spectral properties of multisection shifted DFB lasers with inhomogeneous coupling coefficient,” presented at the Semiconductor and Integrated Opto-Electronics Conference, SIOE’95, Cardiff, Wales, April 1995.