Y. Muroya et al., PRECISE WAVELENGTH CONTROL FOR DFB LASER-DIODES BY NOVEL CORRUGATION DELINEATION METHOD, IEEE photonics technology letters, 9(3), 1997, pp. 288-290
Precise wavelength control of a multiple-wavelength DFB laser-diode (L
D) array was achieved using weighted-dose allocation variable-pitch EB
-lithography (WAVE) and highly uniform MOVPE. Multiple-wavelength 1.3
mu m lambda/4-shifted DFB LD arrays with wavelength spacing of 2.0 nm
were successfully demonstrated. The standard deviation of the waveleng
th was as low as 0.37 nm over 2-in wafers.