title: L-band tunable external cavity laser based on 1.58 μm superluminescent diode integrated with spot-size converter.
abstract: We report a 1.58 μm superluminescent diode (SLD) with a spot-size converter (SSC) designed and fabricated as a light source for a tunable external cavity laser (T-ECL). The active section of the SLD is fabricated by using a planar buried heterostructure (PBH) for low-threshold current and high-output power operation at a low injection current. The SSC structure of the SLD is designed to possess a buried deep-ridge waveguide (BD-RWG) and show a beam of less divergence. The full-width at half maximum (FWHM) of the horizontal and vertical far-field patterns (FFPs), due to the beam of the less divergence, are 14° and 13°, respectively. We also confirm that an L-band T-ECL employing the SSC SLD operates well enough to prove the characteristics of high performance.
authors.affiliation: Electronics and Telecommunications Research Institute, Daejeon, Korea. osh@etri.re.kr
authors.forename: Su Hwan
authors.initials: SH
authors.lastname: Oh
authors.forename: Ki-Hong
authors.initials: KH
authors.lastname: Yoon
authors.forename: Ki Soo
authors.initials: KS
authors.lastname: Kim
authors.forename: Jongbae
authors.initials: J
authors.lastname: Kim
authors.forename: O-Kyun
authors.initials: OK
authors.lastname: Kwon
authors.forename: Dae Kon
authors.initials: DK
authors.lastname: Oh
authors.forename: Young-Ouk
authors.initials: YO
authors.lastname: Noh
authors.forename: Hyung-Jong
authors.initials: HJ
authors.lastname: Lee