| 摘要 |
<p>A laser module (LM) is provided with a quantum-cascade laser (1), a pipe-shaped member (5), and an infrared-ray detector (7). The pipe-shaped member (5) has a pair of opening ends (5a, 5b), and one of the opening ends (5a) is arranged so that it faces face (1b) that is opposite a radiation-emitting end face (1a) of the quantum-cascade laser (1). The infrared-ray detector (7) is arranged so that it faces the other of the opening ends (5b) of the pipe-shaped member (5). The light radiated from the face (rear-side end face) (1b) that is opposite the radiation-emitting end face (front-side end face) (1a) of the quantum-cascade laser (1) is guided through the inner side of the pipe-shaped member (5), enters the infrared-ray detector (7), and is detected.</p> |
