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Journal Article
Novel Bidirectional Optical Subassembly with Embedded Filter, 45-Degree Angle Polished Fiber Cladding and Etched Fiber Core
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- Authors
- Sei Hyoung Lee, Kwon Seob Lim, Jong Jin Lee, Hyun Seo Kang
- Issue Date
- 2009-10
- Citation
- Optical Engineering, v.48, no.10, pp.100502-1-100502-3
- ISSN
- 0091-3286
- Publisher
- SPIE
- Language
- English
- Type
- Journal Article
- Abstract
- The optical wavelength-division-multiplex filter for bidirectional optical subassembly (BOSA) is embedded to the fiber core, which results in simplicity of the BOSA module. The fiber cladding is 45-deg angle polished to receive a downstream signal. The core is etched by a femtosecond laser to have a normal core facet and to transmit an upstream signal. The downstream signal, which is core mode, is coupled to the cladding mode by the long-period fiber grating and then detected by a photodiode by means of the total internal reflection effect at the 45-deg angle polished cladding facet. The measured transmitted and received coupling efficiencies are 27.3 and 43.8%, respectively. © 2009 Society of Photo-Optical Instrumentation Engineers.
- KSP Keywords
- Bidirectional optical subassembly(BOSA), Cladding modes, Femtosecond Laser, Long-period fiber grating(LPFG), Optical instrumentation, Wavelength-division, embedded filter, etched fiber, optical wavelength, total internal reflection(TIR)