[1] Fox A G,Li L. Resonant modes in maser interferometer [J].BSTJ,1961,40: 453-456.
[2] Siegman A E,Miller H Y. Unstable optical resonator loss calculations using the Prony method [J].Appl. Opt.,1970,9: 2729-2736.
[3] Sziklas E A,Siegman A E. Mode calculations in unstable resonators with flowing saturable gain 1: Hermite-Gaussian expansion [J].Appl. Opt.,1974,13: 2275-2282.
[4] Lüsse P,Ramm K,Unger H J. et al. Comparison of vectorial and new semivectorial-finite difference approach for optical waveguides [J].Opt. Quantum Electron,1997,29: 115-120.
[5] Polychronopoulos S J,Athanasoulias G B,Uzunoglu N K. Advanced mode solver using an integral equation technique and entire domain plane wave basis functions [J].Opt. Quantum Electron.,1997,29: 127-137.
[6] Sziklas E A,Siegman A E. Mode calculations in unstable resonators with flowing saturable gain 2: fast Fourier transform method [J].Appl. Opt.,1975,14: 1874-1889.