We report a tunable, single-mode vertical cavity surface-emitting laser (VCSEL) format suitable for array operation, power scaling, fiber coupling, and operation in isolated environments such as those required by atom optics. The devices are fiber VCSELs, consisting of a semiconductor gain and mirror structure separated from a mirror-coated optical fiber by an air (or vacuum) gap. The gain structure has polymer microlenses fabricated on its surface, of characteristics suitable to focus the oscillating mode on both cavity mirrors, ensuring stable fundamental mode emission and high fiber coupling efficiency. We demonstrate such devices in continuous-wave operation at at room temperature, with a single-mode tuning range of , laser threshold as low as , and a maximum fiber-coupled output power of .
© 2007 Optical Society of AmericaFull Article | PDF Article
Vera Russo, Giancarlo C. Righini, Stefano Sottini, and Silvana Trigari
Appl. Opt. 23(19) 3277-3283 (1984)
C. Degen, I. Fischer, and W. Elsäßer
Opt. Express 5(3) 38-47 (1999)
Dominique Heinis, Christophe Gorecki, Sylwester Bargiel, and Bernard Cretin
Opt. Express 14(8) 3396-3405 (2006)