QUASI-PLANAR SPOT-SIZE TRANSFORMER FOR EFFICIENT COUPLING BETWEEN A CLEAVED FIBER AND AN INP INGAASP RIB WAVE-GUIDE/

Authors
GHIRARDI F MERSALI B BRANDON J HERVEGRUYER G CARENCO A
Citation
F. Ghirardi et al., QUASI-PLANAR SPOT-SIZE TRANSFORMER FOR EFFICIENT COUPLING BETWEEN A CLEAVED FIBER AND AN INP INGAASP RIB WAVE-GUIDE/, IEEE photonics technology letters, 6(4), 1994, pp. 522-524
Citations number
8
Categorie Soggetti
Optics,"Physics, Applied
Journal title
IEEE photonics technology letters → ACNP
ISSN journal
10411135
Volume
6
Issue
4
Year of publication
1994
Pages
522 - 524
Database
ISI
SICI code
1041-1135(1994)6:4<522:QSTFEC>2.0.ZU;2-P
Abstract
A spot-size transformer structure is proposed for InP/InGaAsP double-h eterostructure (DH) rib waveguide. Vertical expansion of a factor of 7 is achieved with 3 dB internal loss. Coupling from standard cleaved f ibre (11 mum diameter mode) to a DH rib waveguide (5.8 x 0.8 mum large mode), is achieved with 4.5 dB polarisation independent loss. Couplin g tolerances are highly relaxed. The fabrication method uses a thin cl adding layer which ends up to a quasi-planar structure suitable with f urther integration process.