Title :
1.55-μm ridge DFB laser and electroabsorption Modulator integrated with buried-ridge-stripe dual-waveguide spot-size converter output
Author :
Lianping Hou ; Hongliang Zhu ; Qiang Kan ; Ying Ding ; Baojun Wang ; Fan Zhou ; Wei Wang
Author_Institution :
Nat. Res. Center for Optoelectron. Technol., Chinese Acad. of Sci., Beijing, China
Abstract :
A 1.55-μm ridge distributed feedback laser and electroabsorption modulator monolithically integrated with a buried-ridge-stripe dual-waveguide spot-size converter (SSC) at the output port for low-loss coupling to a cleaved single-mode optical fiber was fabricated by means of selective area growth, quantum-well intermixing, and dual-core technologies. These devices exhibit threshold current of 28 mA, 3-dB modulation bandwidth of 12.0 GHz, modulator extinction ratios of 25.0-dB dc. The output beam divergence angles of the SSC in the horizontal and vertical directions are as small as 8.0/spl deg/×12.6/spl deg/, respectively, resulting in 3.2-dB coupling loss with a cleaved single-mode optical fiber.
Keywords :
distributed feedback lasers; electro-optical modulation; electroabsorption; integrated optics; integrated optoelectronics; laser beams; monolithic integrated circuits; optical fibre fabrication; optical fibre losses; quantum well lasers; waveguide lasers; 1.55 mum; 12.0 GHz; 28 mA; 3.2 dB; DFB laser; buried-ridge-stripe waveguide; cleaved optical fiber; coupling loss; dual-core technologies; dual-waveguide spot-size converter; electroabsorption modulator; low-loss coupling; modulator extinction ratio; monolithic integration; optical fiber fabrication; output beam divergence angles; output port; quantum well intermixing; ridge laser; selective area growth; single-mode optical fiber; Bandwidth; Distributed feedback devices; Extinction ratio; Fiber lasers; Laser feedback; Optical coupling; Optical fiber losses; Optical fibers; Quantum well lasers; Threshold current; Distributed feedback (DFB) laser diode; dual-core structure; electroabsorption modulator (EAM); quantum-well intermixing (QWI); selective area growth (SAG); spot-size converters (SSCs);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.862017
