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Visible-telecom tunable dual-band optical isolator based on dynamic modulation in thin-film lithium niobate

Journal Article · · Optics Letters
DOI:https://doi.org/10.1364/ol.482635· OSTI ID:2424661
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Optical isolators are an essential component of photonic systems. Current integrated optical isolators have limited bandwidths due to stringent phase-matching conditions, resonant structures, or material absorption. Here, we demonstrate a wideband integrated optical isolator in thin-film lithium niobate photonics. We use dynamic standing-wave modulation in a tandem configuration to break Lorentz reciprocity and achieve isolation. We measure an isolation ratio of 15 dB and insertion loss below 0.5 dB for a continuous wave laser input at 1550 nm. In addition, we experimentally show that this isolator can simultaneously operate at visible and telecom wavelengths with comparable performance. Isolation bandwidths up to ∼100 nm can be achieved simultaneously at both visible and telecom wavelengths, limited only by the modulation bandwidth. Our device’s dual-band isolation, high flexibility, and real-time tunability can enable novel non-reciprocal functionality on integrated photonic platforms.

Research Organization:
Univ. of Arizona, Tucson, AZ (United States)
Sponsoring Organization:
USDOE
OSTI ID:
2424661
Journal Information:
Optics Letters, Journal Name: Optics Letters Journal Issue: 8 Vol. 48; ISSN 0146-9592; ISSN OPLEDP
Publisher:
Optical Society of America (OSA)
Country of Publication:
United States
Language:
English

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