title: Musical instrument pickup based on a laser locked to an optical fiber resonator.
abstract: A low-noise transducer based on a fiber Fabry-Perot (FFP) cavity was used as a pickup for an acoustic guitar. A distributed feedback (DFB) laser was locked to a 25 MHz-wide resonance of the FFP cavity using the Pound-Drever-Hall method. The correction signal was used as the audio output and was preamplified and sampled at up to 96 kHz. The pickup system is largely immune against optical noise sources, exhibits a flat frequency response from the infrasound region to about 25 kHz, and has a distortion-free audio output range of about 50 dB.
authors.affiliation: Istituto Nazionale di Ottica, Via Campi Flegrei 80078 Pozzuoli, Napoli, Italy.
authors.forename: Saverio
authors.initials: S
authors.lastname: Avino
authors.forename: Jack A
authors.initials: JA
authors.lastname: Barnes
authors.forename: Gianluca
authors.initials: G
authors.lastname: Gagliardi
authors.forename: Xijia
authors.initials: X
authors.lastname: Gu
authors.forename: David
authors.initials: D
authors.lastname: Gutstein
authors.forename: James R
authors.initials: JR
authors.lastname: Mester
authors.forename: Costa
authors.initials: C
authors.lastname: Nicholaou
authors.forename: Hans-Peter
authors.initials: HP
authors.lastname: Loock
mesh_terms: D000162:Acoustics / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D009146:Music; D055100:Optical Fibers; D014159:Transducers