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- W1673392557 abstract "Abstract : We investigate the dynamics of phase conjugation by degenerate four wave mixing (DFWM) inside a laser cavity. This problem is shown to be important in connection with (a) protection of a high power laser against self focusing and (b) development of a new type of laser gyro. Our theory demonstrates that fast optical and temporal phase conjugation by DFWM is incompatible with large (approx. or equal to 1) reflection coefficients. Therefore, it appears to be better to implement DFWM for the coupling of the two counterpropagating pulses in a ring laser, rather than as an end cavity reflection of a linear laser. Various schemes and media were investigated (sodium vapor, amplifier-absorber, jet, saturable absorber thin jet, saturable absorber coupled by evanescent wave). The largest nonlinear third order susceptibility was found in the amplifier jet. Study of fast dynamics of DFWM in an absorber led us to develop a ring laser producing pulses shorter than 55 fs, tunable in a 20 nm range. The measurements of DFWM inside the absorber jet of a ring laser are the basis of a new diagnostic method to measure very short (less than or approximately 100 fs) relaxation rates. (Author)" @default.
- W1673392557 created "2016-06-24" @default.
- W1673392557 creator A5058308870 @default.
- W1673392557 date "1983-06-30" @default.
- W1673392557 modified "2023-09-24" @default.
- W1673392557 title "Phase Conjugation in a Ring Laser Cavity." @default.
- W1673392557 hasPublicationYear "1983" @default.
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