In a dual cavity laser emitting at a wavelength of 950 nm, one cavity has a length of 300 μm and an effective index of 3.45 while the second cavity has a length of 320 μm and an effective index of...

In a dual cavity laser emitting at a wavelength of 950 nm, one cavity has a

length of 300 μm and an effective index of 3.45 while the second cavity has a

length of 320 μm and an effective index of 3.47. What is the mode spacing of