Abstract

Using a commercial Fourier transform spectrometer (Bomem Inc.), we have recorded the absoption spectrum of the C₂D₂ molecule near the optical communication wavelength of 1550 nm. As for acetylene C₂H₂,¹ this molecule shows about 50 evenly spaced absorption lines between 1511 nm and 1534 nm. On the other hand, ⁸⁷Rb presents two resonances at 1529.261 nm and 1529.366 nm, resulting from transitions between excited states.^2,3 We compare the characteristics of the absorption profile of C₂D₂ to that of ⁸⁷Rb and C₂H₂ for the purpose of frequency locking of tunable semiconductor lasers.

© 1993 Optical Society of America