Details

Autor(en) / Beteiligte

• Fortenberry, R.
• Sorin, W.V.
• Hernday, P.

Titel

Improvement of group delay measurement accuracy using a two-frequency modulation phase-shift method

Ist Teil von

• IEEE photonics technology letters, 2003-05, Vol.15 (5), p.736-738

Ort / Verlag

New York: IEEE

Erscheinungsjahr

2003

Quelle

IEEE Electronic Library (IEL)

Beschreibungen/Notizen

• The modulation phase-shift method is a standard technique for measuring the group delay and dispersion of fiber-optic devices. The wavelength resolution is typically determined by the radio-frequency modulation frequency. Decreasing the modulation frequency improves wavelength resolution at the cost of decreased sensitivity in the measurement of the time delay. We present a technique that simultaneously yields both high wavelength resolution and high time delay sensitivity by combining two measurements made at different modulation frequencies. High-resolution experimental results are shown for a fiber Bragg grating device.