Optical phase‐locking of two longitudinal modes of a dual‐mode laser for millimetre‐wave signal generation. Issue 9 (4th April 2016)

• Record Type: Journal Article
• Authors: Hyodo, M.; Sato, K.; Kawakami, A.; Saito, S.; Watanabe, M.; Adachi, M.
• Is Part Of: Electronics letters. Volume 52:Issue 9(2016)
• Page Start: 748
• Page End: 749
• Publication Date: 2016-04-04
• Subjects: optical phase locked loops -- laser modes -- millimetre wave detectors -- signal generators -- laser cavity resonators; optical phase‐locking -- dual‐mode laser -- millimetre‐wave signal generation -- longitudinal oscillating modes -- dual‐mode microchip laser -- longitudinal‐mode spacing -- electronic negative‐feedback control -- laser cavity -- common‐mode fluctuation -- frequency 101 GHz; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2016.0109
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : Phase‐locking of two longitudinal oscillating modes of a dual‐mode microchip laser that has 101 GHz longitudinal‐mode spacing has been successfully demonstrated by using electronic negative‐feedback control. Since the two longitudinal modes were oscillating simultaneously in the same laser cavity, the common‐mode fluctuation cancels, resulted in the small required control bandwidth of ∼4 kHz. This narrow‐bandwidth phase‐locking technique is useful for generating high‐spectral‐purity millimetre‐wave signals with a considerably simpler setup.