Gottipaty N Rao and Andreas Karpf (2011), Extremely sensitive detection of NO2 employing off-axis integrated cavity output spectroscopy coupled with multiple-line integrated absorption spectroscopy. Applied Optics, Vol. 50 Issue 13, pp.1915-1924.
Gottipaty Rao, James Garofalo and Elias Lanides (2011), Diffuse reflectance-factor measurements of rose petals. Color Research and Application, 36, 148-154.
G. N. Rao and A. Karpf (2011), External cavity tunable quantum cascade lasers and their applications to trace gas monitoring. Applied Optics,, Vol. 50 Issue 4, pp.A100-A115. (2011), 110-115.
G. N. Rao and A. Karpf (2010), High sensitivity detection of NO2 employing cavity ringdown spectroscopy and an external cavity continuously tunable quantum cascade laser. Applied Optics, 49, 4906-4914.
A. Karpf and G. N. Rao (2010), Enhancement of trace gas detection by integrating wavelength modulated spectra across multiple lines. Applied Optics, 49, 1406-1413.
A. Karpf and G. N. Rao (2009), Enhanced Sensitivity for the detection of trace gases using multiple line integrated absorption spectroscopy. Applied Optics, 48, 5061-5066.
G. N. Rao, C. Gudipaty and D. Martin (2009), Higher harmonic detection employing wavelegth modulation spectroscopy and near infrared diode lasers: An undergraduate experiment. American Journal of Physics, 77.
A. Karpf and G. N. Rao (2009), Absorption and wavelength modulation spectrocsopy of NO2 using a tunable external cavity CW quantum cascade laser. Applied Optics, 48, pp. 408-413,.