Mid-infrared difference-frequency generation source pumped by a 1.1–1.5-mu m dual-wavelength fiber amplifier for trace-gas detection
نویسندگان
چکیده
Continuous-wave mid-infrared radiation near 3.5 mm is generated by difference-frequency mixing of the output of a compact 1.1 1.5-mm dual-wavelength fiber amplif ier in periodically poled LiNbO3. The diode sidepumped amplif ier is constructed with double-cladding Yb-doped fiber followed by single-mode Er/Yb codoped fiber. Output powers of as much as 11 mW at 3.4 mm are obtained, and spectroscopic detection of CH4 and H2CO is demonstrated. 1998 Optical Society of America OCIS codes: 280.3420, 300.6340, 190.2620, 060.2320.
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