An analysis of grating-coupled surface emitters (GSEs) consisting of alternating gain and grating sections is reported. The gratings act as distributed Bragg reflectors, output coupler, and transmitting elements to lock adjacent lasers. The effects of losses and detuning from the Bragg condition show that significant reflectivity (within 10% of peak) occurs over wavelengths on the order of 2 to 3 nm, that the reflection with deviation from the Bragg condition is not symmetric, and that the peak reflectivity does not occur precisely at the Bragg condition. These effects are caused by the complicated interactions of the various partial waves. A formulation, that retains this degree of generality is developed to solve for the longitudinal modes of GSE lasers with one and two gain sections. For a laser whose two Bragg wavelengths differ by 0.5 nm, it is found that two longitudinal modes are almost degenerate, and the mode patterns are significantly distorted and displaced from the normal. With the difference reduced to 0.25 nm, the situation is much improved and the device behaves in an acceptable manner.
|Number of pages||1|
|Journal||Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS|
|State||Published - 1989|
|Event||Second Annual Meeting of the IEEE Lasers and Electro-Optics Society - LEOS '89 - Orlando, FL, USA|
Duration: 17 Oct 1989 → 20 Oct 1989