Calculation of the colliding pulse mode locking in CW dye ring lasers

Journal Article · Fri Apr 01 04:00:00 EST 1983 · IEEE J. Quant. Electron.; (United States)

DOI:https://doi.org/10.1109/JQE.1983.1071893· OSTI ID:5482690

Kuhlke, D; Rudolph, W; Wilhelmi, B

A calculation of the influence of a transient absorber grating on the pulse parameters of a dye laser in the ''colliding pulse modelocking'' (CPM) regime is given. It is shown that, compared to other passive methods, considerably shorter pulses with a more favorable stability region can be obtained. Within the stability range of single pulse operation the shortest pulses in the CPM are obtained by operating far above threshold where the saturation energy of the amplifier is much greater than that of the absorber. Deviation from an amplifier position that is symmetric with respect to the amplification of the counter-running pulses leads to different energies of the pulses and to a strong decrease of the stability range. Taking the dispersive properties of absorber and amplifier into consideration, equations for the time dependent phase of the laser pulse are established and solved by an analytical ansatz. The resulting pulse chirp is shown to be mainly dependent on the detuning of the pulse frequency from the center frequency of the saturable absorber. The estimated values for the pulse duration and the down-chirp for typical experimental conditions of a rhodamine 6G-DODCI CPM laser agree well with the measured ones.

• Research Organization: Dept. of Physics, Friedrich Schiller University, Jena
• OSTI ID: 5482690
• Journal Information: IEEE J. Quant. Electron.; (United States), Journal Name: IEEE J. Quant. Electron.; (United States) Vol. 19:4; ISSN IEJQA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
AMINES
AMPLIFIERS
CALCULATION METHODS
CARBOXYLIC ACIDS
DYE LASERS
DYES
ELECTRONIC EQUIPMENT
EQUIPMENT
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
LASERS
LIQUID LASERS
MODE LOCKING
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PULSES
REAGENTS
RHODAMINES
STABILITY