High-power tunable low-noise coherent source at 1.06µm based on a surface-emitting semiconductor laser

Baptiste Chomet (1, 2) , Jian Zhao (3) , Laurence Ferrieres (4) , Mikhaël Myara (1, 2) , Germain Guiraud (3) , Gregoire Beaudoin (5) , Vincent Lecocq (4) , Isabelle Sagnes (5) , Nicholas Traynor , Giorgio Santarelli (3) , Stephane Denet (4) , Arnaud Garnache (1, 2)

1 IES - Institut d’Electronique et des Systèmes
2 TéHO - Térahertz, hyperfréquence et optique
3 LP2N - Laboratoire Photonique, Numérique et Nanosciences
4 INNOPTICS
5 C2N - Centre de Nanosciences et de Nanotechnologies [Marcoussis]

Exploiting III-V semiconductor technologies, vertical external-cavity surface-emitting laser (VECSEL) technology has been identified for years as a good candidate to develop lasers with high power, large coherence and broad tunability. Combined with fiber amplification technology, tunable single-frequency lasers can be flexibly boosted to a power level of several tens of watts. Here, we demonstrate a high power, single frequency and broadly tunable laser based on VECSEL technology. This device emits in the near-infrared around 1.06 µm and exhibits high output power (>100 mW) with a low-divergence diffraction-limited TEM00 beam. It also features a narrow free-running linewidth of < 400 kHz, with high spectral purity (SMSR >55 dB), and continuous broadband tunability greater than 250 GHz (< 15 V piezo voltage, 6 kHz cutoff frequency) with a total tunable range up to 3 THz. In addition, a compact design without any movable intracavity elements offers a robust single-frequency regime. Through fiber amplification, a tunable single-frequency laser is achieved at an output power of 50 W covering the wavelength range from 1057 nm to 1066 nm. Excess intensity noise brought on by the amplification stage is in good agreement with a theoretical model. A low relative intensity noise (RIN) value of-145 dBc/Hz is obtained at 1 MHz and we reach the shot-noise limit above 200 MHz.

Mots clés: (0602320) Fiber optics amplifiers and oscillators; OCIS codes: (1407260) Vertical cavity surface emitting lasers; (0603510) Lasers; (1403070) Infrared and far-infrared lasers; fiber

Domaines: Optique [physics.optics]; Instrumentations et Détecteurs [physics.ins-det]

Baptiste Chomet, Jian Zhao, Laurence Ferrieres, Mikhaël Myara, Germain Guiraud, et al.. High-power tunable low-noise coherent source at 1.06µm based on a surface-emitting semiconductor laser. Applied optics, In press, ⟨10.1364/AO.57.005224⟩. ⟨hal-01804027⟩