Title

Multiheterodyne Detection For Self-Referenced Characterization Of Complex Arbitrary Waveforms From Largely Detuned Optical Frequency Combs

Abstract

Multiheterodyne detection is a particularly effective method in spectroscopy and metrology to measure the full, complex spectrum of an unknown signal [1,2]. Upon photodetection, the mixing of two optical frequency combs (OFCs) with different mode spacings produces a frequency comb in the radio frequency (RF) domain which retains the amplitude and phase information of both OFCs [3]. If one of the two OFCs acts as a reference with flat spectral phase, the spectral phase of the RF comb directly mirrors that of the test comb, which can then be mapped to the optical spectrum and Fourier transformed to produce the comb's time-domain waveform [4]. Recently, it has been demonstrated that by considering a larger portion of the RF comb, a self-referenced measurement of each optical comb can be recovered, thus eliminating the need for a known reference with flat phase [5]. In this manuscript, a more general form of this technique is explored, in which the mode spacings of the two unknown comb sources are detuned from each other by a factor of two or greater. This is a case of interest, seeing as how arbitrary waveforms generated from spectral modulation of OFCs which one might wish to characterize regularly exceed 10's of GHz rates, whereas the self-referenced, carrier-envelope offset stabilized sources which provide absolute knowledge of the optical frequencies involved in the multiheterodyne process are most commonly found in the sub-GHz repetition rate regime. © 2012 IEEE.

Publication Date

12-13-2012

Publication Title

2012 IEEE Avionics, Fiber- Optics and Photonics Technology Conference, AVFOP 2012

Number of Pages

102-103

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/AVFOP.2012.6344043

Socpus ID

84870737547 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84870737547

This document is currently not available here.

Share

COinS