Abstract
The linewidth of a room-temperature free-running 940-nm cw single-frequency 1-mm-long quantum-well InGaAs/AlGaAs diode laser in a 10-cm-long external cavity has been measured as a function of the output power by the heterodyne technique. The power-dependent component of the observed Lorentzian linewidth displays a linewidth –power product of 28 ± 4 k Hz mW, which is 2 orders of magnitude larger than that predicted from the spontaneous emission model. The shot-noise model of Welford and Mooradian [Appl. Phys. Lett. 40, 560 (1982)] for the power-independent linewidth has been extended to account for the observed power-dependent linewidth.
| Original language | English |
|---|---|
| Pages (from-to) | 1788-1790 |
| Number of pages | 3 |
| Journal | Optics Letters |
| Volume | 20 |
| Issue number | 17 |
| DOIs | |
| State | Published - 1 Jan 1995 |
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Hsu, L., Mooradian, A., & Aggarwal, R. L. (1995). Spectral linewidth of a free-running continuous-wave single-frequency external-cavity quantum-well InGaAs/AlGaAs diode laser. Optics Letters, 20(17), 1788-1790. https://doi.org/10.1364/OL.20.001788