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PowerPhotonic Ltd. - High Power Laser Diode Optic Solutions LB 12/25

Linewidth Measurement of Diode Lasers

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Friday, August 8, 2025
TOPTICA Photonics Inc.

The spectral purity of a laser is one of its core features. It is however non-trivial to find quantities which fully characterize this spectral purity. In this paper we discuss two linewidth definitions which TOPTICA uses to characterize the frequency stability of its diode lasers. These quantities reflect the two conceptual sources of phase or frequency noise in diode lasers.

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File: 2025_8_8_Linewidth_measurements_of_diode_lasers.pdf (286.75 KB)
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