### Abstract

This paper describes the results of a detailed experimental study of an electron-beam-pumped, high Kr concentration KrF laser. The excitation rate is 1.4 MW/cm^{3} for 1 atm of Kr gas. The formation efficiency of KrF* and extraction efficiency are estimated using calculated values of saturation intensity and g_{0}/α_{0}, the ratio of small-signal gain to saturable absorption, together with measured values of g_{0} and the ratio of g_{0} to nonsaturable absorption (α_{n}). Although the highest formation efficiency of 24% is observed at 99.7% Kr concentration, the effect of finite vibrational-relaxation rate significantly decreases the KrF* density accessible to lasing at high Kr concentration due to the shorter lifetime of KrF*. KrF* vibrational-relaxation rates of 4×10^{-11} and 5×10^{-11} cm^{3} s ^{-1} are determined for Ar gas and Kr gas, respectively. A decrease of g_{0}/α_{0} and g_{0}/α _{n} resulting in low extraction efficiency is observed at high Kr concentration due to the relatively high α_{0} and α_{n}. The intrinsic efficiencies are 11, 11.8, and 9% for 1 atm mixtures at 10, 50, and 99.7% Kr, respectively.

Original language | English |
---|---|

Pages (from-to) | 476-488 |

Number of pages | 13 |

Journal | Journal of Applied Physics |

Volume | 61 |

Issue number | 2 |

DOIs | |

Publication status | Published - 1987 |

Externally published | Yes |

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### ASJC Scopus subject areas

- Physics and Astronomy (miscellaneous)

### Cite this

*Journal of Applied Physics*,

*61*(2), 476-488. https://doi.org/10.1063/1.338247

**Parametric studies of an electron-beam-pumped krypton-rich KrF laser.** / Kannari, Fumihiko; Shaw, M. J.; O'Neill, F.

Research output: Contribution to journal › Article

*Journal of Applied Physics*, vol. 61, no. 2, pp. 476-488. https://doi.org/10.1063/1.338247

}

TY - JOUR

T1 - Parametric studies of an electron-beam-pumped krypton-rich KrF laser

AU - Kannari, Fumihiko

AU - Shaw, M. J.

AU - O'Neill, F.

PY - 1987

Y1 - 1987

N2 - This paper describes the results of a detailed experimental study of an electron-beam-pumped, high Kr concentration KrF laser. The excitation rate is 1.4 MW/cm3 for 1 atm of Kr gas. The formation efficiency of KrF* and extraction efficiency are estimated using calculated values of saturation intensity and g0/α0, the ratio of small-signal gain to saturable absorption, together with measured values of g0 and the ratio of g0 to nonsaturable absorption (αn). Although the highest formation efficiency of 24% is observed at 99.7% Kr concentration, the effect of finite vibrational-relaxation rate significantly decreases the KrF* density accessible to lasing at high Kr concentration due to the shorter lifetime of KrF*. KrF* vibrational-relaxation rates of 4×10-11 and 5×10-11 cm3 s -1 are determined for Ar gas and Kr gas, respectively. A decrease of g0/α0 and g0/α n resulting in low extraction efficiency is observed at high Kr concentration due to the relatively high α0 and αn. The intrinsic efficiencies are 11, 11.8, and 9% for 1 atm mixtures at 10, 50, and 99.7% Kr, respectively.

AB - This paper describes the results of a detailed experimental study of an electron-beam-pumped, high Kr concentration KrF laser. The excitation rate is 1.4 MW/cm3 for 1 atm of Kr gas. The formation efficiency of KrF* and extraction efficiency are estimated using calculated values of saturation intensity and g0/α0, the ratio of small-signal gain to saturable absorption, together with measured values of g0 and the ratio of g0 to nonsaturable absorption (αn). Although the highest formation efficiency of 24% is observed at 99.7% Kr concentration, the effect of finite vibrational-relaxation rate significantly decreases the KrF* density accessible to lasing at high Kr concentration due to the shorter lifetime of KrF*. KrF* vibrational-relaxation rates of 4×10-11 and 5×10-11 cm3 s -1 are determined for Ar gas and Kr gas, respectively. A decrease of g0/α0 and g0/α n resulting in low extraction efficiency is observed at high Kr concentration due to the relatively high α0 and αn. The intrinsic efficiencies are 11, 11.8, and 9% for 1 atm mixtures at 10, 50, and 99.7% Kr, respectively.

UR - http://www.scopus.com/inward/record.url?scp=0002242815&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0002242815&partnerID=8YFLogxK

U2 - 10.1063/1.338247

DO - 10.1063/1.338247

M3 - Article

AN - SCOPUS:0002242815

VL - 61

SP - 476

EP - 488

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 2

ER -