2. A Q-switched laser uses a cavity with a length of 1m and an average mirror reflectivity of r = 0.9. The gain medium is an Nd:YAG crystal, which is pumped by a flashlamp. a) What is the cavity loss...
2. A Q-switched laser uses a cavity with a length of 1m and an average mirror reflectivity of r 0.9 The gain medium is an Nd:YAG crystal, which is pumped by a flashlamp. a) What is the cavity loss time ignoring losses in the gain medium and approximating the refractive index of the cavity as near unity? b) What is the quality factor (Q)? c) Draw the optical configuration in the laser cavity for a quarter wave electro-optical q-switch for...
(a) The optical gain coefficient of a semiconductor laser with 150 μm cavity length is shown in Fig 1. The loss coefficient and the refractive index of the semiconductor laser are 21.6 cm" and 3.5 respectively. Find (i)The minimum gain coefficient required for lasing (ii) The frequency separation between the longitudinal modes of the laser (iii) The number of longitudinal modes emitted (b) This laser is required to produce a single mode output at a wavelength of 1.32 unm If...