Details

Autor(en) / Beteiligte

• Pineda-Vadillo, P
• Lynch, M
• Charlton, C
• Tessarin, S
• Donegan, J F
• Weldon, V

Titel

Laser diode linewidth measurement using high-Q spherical microresonators

Ist Teil von

• Electronics letters, 2011-01, Vol.47 (2), p.1-1

Ort / Verlag

Stevenage: John Wiley & Sons, Inc

Erscheinungsjahr

2011

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A novel technique to measure the emission linewidth of laser diodes (LDs) utilising whispering gallery modes (WGMs) in high-Q microspheres (diameter ≈ 200 µm) is proposed and demonstrated. Laser light from a distributed feedback (DFB) LD operating at λ ≈ 1537.1 nm is coupled into silica glass microspheres of Q ≈ 10^sup 7^ (estimated experimentally). WGM spectra are recorded and then used to estimate the DFB LD emission linewidth, yielding a value of 3.8 MHz. The estimated value is in good agreement, within experimental error, with a linewidth value of 6.0 MHz independently measured using the self-homodyne technique, strongly supporting the validity of this novel method.