Reflection properties of multimode interference devices

Reflection properties of multimode interference devices

We report on the reflection properties of multimode interference (MMI) devices: we distinguish between reflection back into the input waveguides and internal resonance modes due to the occurrence of simultaneous self-images. Because of self-imaging, reflection can be extremely efficient, even in the...

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Veröffentlicht in:IEEE photonics technology letters 1994-06, Vol.6 (6), p.715-718
Hauptverfasser: Pennings, E.C.M., van Roijen, R., van Stralen, M.J.N., de Waard, P.J., Koumans, R.G.M.P., Verbeck, B.H.
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Circuit properties
Couplers
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Interference
Laser modes
Mirrors
Miscellaneous
Optical and optoelectronic circuits
Optical reflection
Optical waveguides
Power lasers
Resonance
Ring lasers
Waveguide lasers
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Zusammenfassung:We report on the reflection properties of multimode interference (MMI) devices: we distinguish between reflection back into the input waveguides and internal resonance modes due to the occurrence of simultaneous self-images. Because of self-imaging, reflection can be extremely efficient, even in the case of MMI devices with optimized transmission. This conclusion is confirmed by the observed spectral behavior of InP-based ring lasers incorporating MMI 3 dB couplers and MMI power splitters. Several techniques are proposed to minimize the influence of these reflections.< >
ISSN:1041-1135
1941-0174
DOI:10.1109/68.300172