title: Electro-optically spectrum narrowed, multiline intracavity optical parametric oscillators.
abstract: We report on the first building of an active spectral narrowing mechanism in a pulsed, multiline optical parametric oscillator (OPO) based on a novel aperiodically poled lithium niobate (APPLN) device constructed using the aperiodic optical superlattice technique. The APPLN device functions simultaneously in the system as a multi-channel optical parametric down converter (OPDC) and an electro-optic (EO) gain spectral filter working on the corresponding (multiple) signal bands. When the APPLN OPO was installed in a diode pumped Nd:YVO4laser system, highly narrowed dual-wavelength signal lines (at 1540 and 1550 nm) were observed at the output of the system through EO control of the APPLN. Correspondingly, an enhancement of the power spectral density of the source by a factor of ~7.8 with respect to the system operated in passive mode was found.
authors.forename: W K
authors.initials: WK
authors.lastname: Chang
authors.forename: H P
authors.initials: HP
authors.lastname: Chung
authors.forename: Y Y
authors.initials: YY
authors.lastname: Chou
authors.forename: R
authors.initials: R
authors.lastname: Geiss
authors.forename: S D
authors.initials: SD
authors.lastname: Yang
authors.forename: T
authors.initials: T
authors.lastname: Pertsch
authors.forename: Y H
authors.initials: YH
authors.lastname: Chen