Title :
The efficiency improvement of a bidirectional optical subassembly
Author :
Wu, Hao ; Huang, Zhang-Di ; Yu, Zi-Yan ; Qian, Xiao-Shi ; Chen, Beckham ; Lu, Yan-qing
Author_Institution :
Dept. of Mater. Sci. & Eng., Nanjing Univ., Nanjing, China
Abstract :
An approach to improve the coupling efficiency of bidirectional optical sub-assembly (BOSA) modules is proposed and experimentally demonstrated. We analyzed the wave-front aberration coefficients of a typical BOSA. It was found that the 45° wavelength filter induces coma and astigmatism, and then it further deteriorates the laser diode (LD) to fiber coupling. We measured the BOSA efficiencies based on a serial of different filters. For a typical 0.5 mm filter, 25% coupling efficiency improvement was achieved by optimizing the filter parameters.
Keywords :
optical communication equipment; optical fibre couplers; optical fibre filters; semiconductor lasers; BOSA modules; astigmatism; bidirectional optical subassembly modules; coma; coupling efficiency; fiber coupling; filter; laser diode; size 0.5 mm; wave-front aberration coefficients; High speed optical techniques; Optical coupling; Optical fiber filters; Optical fibers; Optical filters; Optical network units; Optical refraction; Optical variables control; Transceivers; Vision defects; Bidirectional optical sub-assembly (BOSA); aberration; fiber to the home (FTTH);
Conference_Titel :
Communications, 2009. APCC 2009. 15th Asia-Pacific Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-4784-8
Electronic_ISBN :
978-1-4244-4785-5
DOI :
10.1109/APCC.2009.5375558
