Coupling characteristics of laser diode to multimode fiber using separate lens methods
This paper presents the characteristics of an InGaAsP laser diode to a multimode fiber coupling using four separate lens methods. The maximum coupling efficiencies and misalignment tolerances of optical circuit components are clarified for the specific methods: (1) using a relatively large spherical lens, (2) applying a hemispherical-ended GRIN rod lens, (3) using a combination of a relatively large spherical lens and a GRIN rod lens, and (4) employing a combination of two relatively large spherical lenses. The measured results are compared with those for a butt joint and tapered hemispherical-ended fiber methods. The coupling methods utilizing relatively large lenses are shown to have several features advantageous in the fabrication of practical laser diode modules.
- Research Organization:
- NTT Musashino Electrical Communication Laboratory, Musashino-shi 180, Japan
- OSTI ID:
- 6113567
- Journal Information:
- Appl. Opt.; (United States), Journal Name: Appl. Opt.; (United States) Vol. 25:1; ISSN APOPA
- Country of Publication:
- United States
- Language:
- English
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