  Using the Tunable Diode Laser Absorption Spectroscopy (TDLAS) 82 CH$_3$I
ro-vibrational overtone absorption were detected for the first time between
11660 and 11840 cm$^{-1}$ (844 -- 857 nm), with strengths estimated to be
around $10^{-27}$ -- 10$^{-26}$ cm/molecule. The lines have been measured
utilizing commercial heterostructure F-P type diode lasers, multipass cells and
the wavelength modulation spectroscopy with second harmonic detection
technique. A high modulation amplitude approach was adopted for the analysis of
the line shapes. Self-broadening coefficients have been obtained for two lines.
