Oh D B, Hovde D C
Appl Opt. 1995 Oct 20;34(30):7002-5. doi: 10.1364/AO.34.007002.
An external-cavity diode laser operating at 1500 nm was used to record the combination band of acetylene (C(2)H(2)). By combination of wavelength-modulation spectroscopy with a noise-canceler detection circuit, a minimum detectable absorbance of 4.8 × 10(-4) with a 300-ms time constant was achieved, although this result was limited by étalon fringes. When combined with this detection technique, continuous, widely tunable output from an external-cavity laser is ideally suited for high-resolution absorption spectroscopy with excellent sensitivity.
使用工作在1500纳米的外腔二极管激光器记录乙炔（C₂H₂）的组合带。通过将波长调制光谱与噪声消除检测电路相结合，实现了300毫秒时间常数下4.8×10⁻⁴的最小可检测吸光度，不过该结果受标准具条纹限制。当与这种检测技术结合时，外腔激光器的连续、宽可调输出非常适合具有出色灵敏度的高分辨率吸收光谱。
