Conclusions

• We observed mode hopping for changes in temperature and input current.
• We saw differences in the lasing point at different temperatures
• We found the cavity length l = 0.2868 mm at 50mA and 31 degrees C
• We saw the excitation of Rubidium from the 5s state to the 5p state at a wavelength of 794.98 nm (Current = 97 mA, Temperature = 45 C). The expected value was 794.978 nm.

Error

• The index of refraction is dependent on the temperature of the laser and the composition of the diode. We used an educated guess for the index of refraction in our measurements.