Research Article
Research on Spectroscopy Modulation of a Distributed Feedback Laser Diode Based on the TDLAS Technique
Table 1
Comparison of characteristics among four wavelength modulation methods.
| Parameter | Plasma effect | Electric field effect | Temperature effect | Mechanical effect |
| Δn | −0.04 | −0.01 | −0.01 | —— | Δλ | −8 nm | −1 nm | +5 nm | Depends on gain spectrum | Response time | ∼ ns | ∼ ps | ∼ ms | ∼ ms | Heat value | High | Very low | Very high | None | Technical difficulty | Medium | Medium | Simple | Complex |
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