Premium
Interferometric measurement of femtosecond optical pulses emitted from a fibre probe
Author(s) -
Kawashima H.,
Furuki M.,
Tani T.
Publication year - 1999
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1046/j.1365-2818.1999.00494.x
Subject(s) - optics , femtosecond , interferometry , aperture (computer memory) , interference (communication) , harmonics , physics , direct conversion receiver , wavelength , homodyne detection , optical fiber , laser , materials science , channel (broadcasting) , electrical engineering , quantum mechanics , voltage , acoustics , engineering
An interferometric technique is applied to a temporal analysis of the far‐field radiation from a near‐field optical fibre probe. A balanced homodyne scheme combined with lock‐in detection at dual harmonics allows one to evaluate the temporal form of weak signal pulses, even in the presence of some environmental vibrations that disturb the optical interference. The transmission properties of a small aperture are formulated theoretically. It is shown that the sub‐wavelength aperture should not distort the femtosecond optical pulses temporally, which is consistent with the experimental observation.