A facetless regrowth-free single mode laser based on MMI couplers. (1st September 2017)

• Record Type: Journal Article
• Authors: Caro, Ludovic; Kelly, Niall P.; Dernaika, Mohamad; Shayesteh, Maryam; Morrissey, Padraic E.; Alexander, Justin K.; Peters, Frank H.
• Is Part Of: Optics & laser technology. Volume 94(2017)
• Page Start: 159
• Page End: 164
• Publication Date: 2017-09-01
• Subjects: Semiconductor laser -- Single mode -- Facetless -- Regrowth-free; Optics -- Periodicals; Lasers -- Periodicals; Electronic journals; 621.366
• DOI: 10.1016/j.optlastec.2017.03.029
• Languages: English
• ISSNs: 0030-3992

Abstract

Highlights: A facetless regrowth-free semiconductor laser is proposed. Vernier and thermal tuning are achieved. The laser is single mode, with SMSR values of 25dB and higher. The design does not require regrowth or advanced lithography techniques. This laser is a cost-effective alternative to grating-based lasers. Abstract: This paper presents a facetless, tunable laser operating near 1575 nm, as well as a theoretical model predicting spectral features of the laser. The lasers were fabricated without regrowth or advanced lithography techniques, and are based on MMI couplers and etched facets. Coarse vernier tuning was achieved over a range of 25 nm, while fine, thermal tuning was also demonstrated over a range of 1.5 nm. SMSR values of 25 dB and higher were observed, with a measured laser linewidth of 600 kHz.