Optical: systems and elements – Optical amplifier – Particular active medium
Reexamination Certificate
2008-08-14
2010-12-28
Hellner, Mark (Department: 3663)
Optical: systems and elements
Optical amplifier
Particular active medium
Reexamination Certificate
active
07859746
ABSTRACT:
A polarization-independent SOA is provided which uses an InP substrate (11) as a semiconductor substrate and uses GaInNAs having introduced tensile strain as an active layer (14). With this configuration, the polarization independence is achieved by introducing the tensile strain, and high saturation optical output power is realized by reducing the film thickness of the active layer (14) as well as the gain peak wavelength is increased by reducing the band gap of the active layer (14) through use of GaInNAs made by adding nitrogen (N) to GaInAs as a material of the active layer (14) so as to achieve high gain especially in C-band and L-band even when band filling exits at the time of injecting a high current into the active layer (14).
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Notification of Transmittal of Translation of the International Preliminary Report on Patentability (Form PCT/IB/338) of International Application No. PCT/JP2006/302711 mailed Aug. 28, 2008 with Forms PCT/IB/373 and PCT/ISA/237.
International Search Report of PCT/JP2006/302711, date of mailing Mar. 7, 2006.
Morito Ken
Tanaka Shinsuke
Yamazaki Susumu
Diacou Ari M
Fujitsu Limited
Fujitsu Patent Center
Hellner Mark
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