Asmari, A.Hodgkinson, JaneChehura, EdmonStaines, Stephen E.Tatam, Ralph P.2017-06-132017-06-132017-05-10Asmari A, Hodgkinson J, Chehura E, et al., (2017) All-electronic frequency stabilization of a DFB laser diode. Optics Express, Volume 25, Issue 10, May 2017, pp. 11679-116911094-4087http://dx.doi.org/10.1364/OE.25.011679https://dspace.lib.cranfield.ac.uk/handle/1826/12010A laser diode’s junction voltage is a sensitive measure of its temperature and can be used in a thermal control feedback loop. To compensate for the temperature dependence of the laser’s internal resistance, we have measured the dynamic resistance, ∂V/∂I, by modulating the injection current and measuring the demodulated voltage. The junction voltage was thus controlled while operating at fixed DC injection current. Over an external temperature range of 15°C to 35°C, this stabilised the centre frequency (wavelength) of a 1651 nm DFB laser diode with a residual mean frequency shift of 60 MHz (0.5pm), less than the uncertainty on the centre frequency of 80 MHz (0.7 pm). Under the same conditions, conventional thermistor control gave a systematic wavelength shift of −8.4 GHz (−76 pm), and control of the uncompensated forward voltage gave a shift of 9.9 GHz (90 pm).enAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/Diode lasersLaser stabilizationThermal effectsSpectroscopy, diode lasersArticle17482139