Narrow Linewidth of 633-nm DBR Ridge-Waveguide Lasers
IEEE Photonics Technol. Lett., vol. 25, no. 6, pp. 550-552 (2013).
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Compact laser sources with long coherence lengths in the visible spectral region are sought for many applications. This letter presents distributed-Bragg-reflector (DBR) ridgewaveguide (RW) lasers with an emission wavelength at 633 nm and an optical output power >20 mW. The DBR-RW lasers exhibit a technical linewidth at full width at half maximum of ≈1 MHz. The emission line can be tuned via current and temperature >200 GHz. At 14 mW, the lasers show a preliminary lifetime >4000 h.
Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, D-12489 Berlin, Germany
633 nm, DBR-RW laser, linewidth.