Lens-free in-line optical isolators
1999; Optica Publishing Group; Volume: 24; Issue: 19 Linguagem: Inglês
10.1364/ol.24.001337
ISSN1539-4794
AutoresTakashi Sato, Junqiang Sun, Ryosuke Kasahara, Shojiro Kawakami,
Tópico(s)Optical Network Technologies
ResumoWe constructed a lens-free in-line optical isolator by embedding an isolator chip in a thermally expanded core (TEC) fiber without complicated optical alignment. The chip consists of two pairs of rutile wedges and garnet plates. We fabricated the TEC fibers by heating a single-mode fiber with a 200?µm outer diameter; low loss and a spot diameter as large as 49 µm were successfully obtained. The fabricated isolator has excellent optical properties, an insertion loss of 0.45 dB, and an isolation of more than 50 dB at a 1.55?µm wavelength, which confirms the usefulness of the integration techniques.
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