A multiwavelength, multistripe tunable laser array is proposed, and its application to absorption spectroscopy is demonstrated. Laser waveguides doped with Rhodamine 6 G dye were integrated on a plastic chip, and simultaneous output at different wavelengths was obtained by use of a distributed-feedback technique. A very low threshold of was attained, and spectrally narrowed output was obtained. A scheme for digital spectroscopy is also proposed based on this laser array, and absorption spectroscopy of sodium atoms without wavelength scanning is demonstrated by use of a sodium-vapor cell.
© 2002 Optical Society of AmericaFull Article | PDF Article
Yuji Oki, Takeshi Yoshiura, Yuichi Chisaki, and Mitsuo Maeda
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