Patent Number: 7,102,174

Title: Light emitting device and light emitting device module

Abstract: The present invention discloses a light emitting device comprising a substrate transparent at the emission wavelength and an active layer structure formed on such substrate, in which the thickness of the substrate is 75 .mu.m or less, and/or a layer for suppressing spectral-intensity-modulation due to the substrate-mode is provided between the substrate and the active layer structure. Such device can suppress the spectral-intensity modulation due to the substrate-mode, which is observed for the case the substrate is transparent at the emission wavelength, to thereby provide a light emission device excellent in linearity of the current-light output characteristics, and to thereby improve the coupling characteristics with an external cavity.

Inventors: Hideyoshi; Horie (Ushiku, JP), Nagao; Satoru (Ushiku, JP), Yamamoto; Yoshitaka (Ushiku, JP), Fujimori; Toshinari (Ushiku, JP)

Assignee: Mitsubishi Chemical Corporation

International Classification: H01L 33/00 (20060101)

Expiration Date: 9/05/02018