What result can be expected by maintaining longer photon residence time within a resonant cavity?

Maintaining a longer photon residence time within a resonant cavity allows photons to interact with the medium for longer periods. This extended interaction time facilitates a greater probability for stimulated emission to occur. In stimulated emission, an incoming photon can stimulate the emission of another photon that is in phase and traveling in the same direction. The longer the photons stay within the cavity, the higher the chance that they will encounter excited atoms or molecules capable of emitting photons due to this stimulated process.

Furthermore, longer residence times optimize the amplification of light, as they create conditions that are favorable for the alignment of oscillating photons with the atomic or molecular emissions in the medium. This leads to a more intense output of coherent light, which is fundamental in applications such as lasers. Enhanced stimulated emission is crucial for generating coherent light in laser applications, which is why this answer aligns with the principles of photonics and opto-electronics.