Achromatic phase matching for second harmonic generation of femtosecond pulses

• Published in: IEEE journal of quantum electronics Vol. 25; no. 12; pp. 2464 - 2468
• Main Author: Martinez, O.E.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.12.1989; Institute of Electrical and Electronics Engineers
• Subjects: 426002 - Engineering- Lasers & Masers- (1990-); ANGULAR VELOCITY; Bandwidth; Crystals; ELECTRONIC EQUIPMENT; ENGINEERING; EQUATIONS; Exact sciences and technology; Frequency conversion; FREQUENCY MIXING; FUNCTION GENERATORS; Fundamental areas of phenomenology (including applications); HARMONIC GENERATION; Laser mode locking; LASERS; Nonlinear optics; Optical frequency conversion; Optical harmonic generation; Optical pulse shaping; Optics; PHASE SHIFT; Physics; Power system harmonics; Pulse amplifiers; PULSE GENERATORS; PULSES; VELOCITY; Femtosecond; Phase; Optical pulse; Second harmonic; Non linear optics; Adaptation
• ISSN: 0018-9197; 1558-1713
• DOI: 10.1109/3.40630

A scheme is proposed by which the phase matching bandwidth can be increased by adjusting higher-order terms in frequency shift in the phase-matching condition. This is achieved by introducing a spectral angular dispersion so that the different spectral components propagate at their phase-matching angles. This is equivalent to canceling the group velocity mismatch. The equations describing the requirements on the angular dispersion are discussed and applied to the particular case of type I phase matching. A possible experimental setup is shown that would meet all the conditions required.< >