In the above example, if the laser gain profile bandwidth is 500 MHz, how many longitudinal modes are possible?
As mentioned above that though the number of possible modes exceed three million but the number is restricted by fluorescence curve and only the modes for which the gain of laser of the laser medium G (λ) > 1 would be supported. In the present case, this bandwidth is 500 MHz, and the frequency spacing between two modes is 150 MHz. Thus maximum number of modes can be = (bandwidth / spacing) = 500 / 150 = 3.33. In a practical case only three modes will be excited.
Related Questions
- Calculate the number of possible longitudinal modes in a He-Ne laser having a cavity of length of one meter.What is the separation between two modes?
- In the above example, if the laser gain profile bandwidth is 500 MHz, how many longitudinal modes are possible?
- What are the possible modes of delivery of OLE?
