Multilevel Maxwell--Bloch-equation description of ultrashort laser pulse amplification in inhomogeneously broadened XeCl media

Journal Article · Wed Aug 01 00:00:00 EDT 1990 · Journal of the Optical Society of America, Part B: Optical Physics; (USA)

DOI:https://doi.org/10.1364/JOSAB.7.001493· OSTI ID:6516016

Kannari, F; Obara, M ^[1]

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1. Department of Electrical Engineering, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223 (Japan)

Coherent amplification of short-pulse XeCl lasers is studied theoretically by using multilevel Maxwell--Bloch equations in which the vibrational--rotational structures of a XeCl gain spectrum are included. The model used considers 100 transitions each in the P and R branches for six different vibrational transitions of XeCl(B, v=0) {r arrow} XeCl(X, v{prime}=0--5). Coherence components between sublevels in the B and X states are also properly calculated. The model can successfully predict coherent effects such as a quantum beat caused by the spectrum overlap of the several vibrational--rotational transitions involved in a short-pulse laser spectrum. During amplification, laser pulses experience some nonlinear effects caused by the complex gain spectrum structure and by the coherent interactions; thus a considerable change in the laser pulse shape and a substantial reduction in the duration of the amplified laser pulse are predicted. The Frantz--Nodvik equation in the rate-equation limit and even single-level Maxwell--Bloch equations are not applicable for short-pulse propagation analyses in inhomogeneously broadened gain media.

• OSTI ID: 6516016
• Journal Information: Journal of the Optical Society of America, Part B: Optical Physics; (USA), Vol. 7:8; ISSN 0740-3224
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
ELECTROMAGNETIC PULSES
AMPLIFICATION
EXCIMER LASERS
ENERGY-LEVEL TRANSITIONS
BLOCH EQUATIONS
GAIN
MAXWELL EQUATIONS
ROTATIONAL STATES
VIBRATIONAL STATES
XENON CHLORIDES
CHLORIDES
CHLORINE COMPOUNDS
DIFFERENTIAL EQUATIONS
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
EQUATIONS
EXCITED STATES
GAS LASERS
HALIDES
HALOGEN COMPOUNDS
LASERS
PARTIAL DIFFERENTIAL EQUATIONS
PULSES
RADIATIONS
RARE GAS COMPOUNDS
XENON COMPOUNDS
426002* - Engineering- Lasers & Masers- (1990-)