https://ocw.mit.edu/resources/res-6-005-understanding-lasers-and-fiberoptics-spring-2008/laser-fundamentals-i/ https://ocw.mit.edu/resources/res-6-005-understan

https://ocw.mit.edu/resources/res-6-005-understanding-lasers-and-fiberoptics-spring-2008/laser-fundamentals-i/ https://ocw.mit.edu/resources/res-6-005-understanding-lasers... I was curious as well