We have observed the emission spectra of three-dimensional Rayleigh-Fabry-Perot cavity whispering-gallery modes from photonic quantum ring lasers that give rise to uniform angular mode spacing in space. The observed angular distribution (0° ∼ 30°) of the emission modes is linear with respect to the mode number. For example, the average angular mode spacing is 0.95° with a standard deviation of 0.098° for a 20-µm-diameter laser, whose potential angle-resolving power is promising for angle-sensing applications in the future.
© 2003 Optical Society of America
Original Manuscript: February 10, 2003
Revised Manuscript: June 11, 2003
Published: September 20, 2003
Joongwoo Bae, Jawoong Lee, Dongkwon Kim, Jun-Youn Kim, and O’Dae Kwon, "Extremely uniform angular distributions of the three-dimensional emission spectra of photonic quantum ring lasers," Appl. Opt. 42, 5508-5511 (2003)