{"doi":"10.1364/oe.517961","title":"Four-channel optically pumped magnetometer for a magnetoencephalography sensor array","abstract":"We present a novel four-channel optically pumped magnetometer (OPM) for magnetoencephalography that utilizes a two-color pump/probe scheme on a single optical axis. We characterize its performance across 18 built sensor modules. The new sensor implements several improvements over our previously developed sensor including lower vapor-cell operating temperature, improved probe-light detection optics, and reduced optical power requirements. The sensor also has new electromagnetic field coils on the sensor head which are designed using stream-function-based current optimization. We detail the coil design methodology and present experimental characterization of the coil performance. The magnetic sensitivity of the sensor is on average 12.3 fT/rt-Hz across the 18 modules while the average gradiometrically inferred sensitivity is about 6.0 fT/rt-Hz. The sensor 3-dB bandwidth is 100 Hz on average. The on-sensor coil performance is in good agreement with the simulations.","journal":"Optics Express","year":2024,"id":432943,"datarank":0.0,"base_score":0.0,"endowment":0.0,"self_citation_contribution":0.0,"citation_network_contribution":0.0,"self_endowment_contribution":0.0,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":14,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.9568,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2024-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":256797,"name":"Tony R. Carter","orcid":null,"position":1,"is_corresponding":false},{"id":1197398,"name":"Jonathan E. Dhombridge","orcid":"0000-0001-9768-387X","position":2,"is_corresponding":false},{"id":1197645,"name":"Timothy S. Read","orcid":null,"position":3,"is_corresponding":false},{"id":1013429,"name":"Kaleb Campbell","orcid":null,"position":4,"is_corresponding":false},{"id":1197646,"name":"Quinn Abate","orcid":null,"position":5,"is_corresponding":false},{"id":1197647,"name":"David M. Ridley","orcid":null,"position":6,"is_corresponding":false},{"id":253940,"name":"Amir Borna","orcid":"0000-0002-6536-3748","position":7,"is_corresponding":false},{"id":253945,"name":"Peter Schwindt","orcid":"0000-0002-7570-1229","position":8,"is_corresponding":false},{"id":633002,"name":"Joonas Iivanainen","orcid":"0000-0001-6034-4604","position":0,"is_corresponding":true}],"reference_count":55,"raw_metadata":null,"created_at":"2026-07-19T01:59:39.937122Z","pmid":"38858992","pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}