{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:TY263CWGUPHQHO276HQRFI555K","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"38749dc6165f73c74ce3bb375e4da9f5130afa0b8dcc64d55a98538901cf9f82","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-08-01T14:47:16Z","title_canon_sha256":"603c8be70d7ee5e6f83a432e0f651e2b4ebbeafdb838bf523ad513a28a3411ec"},"schema_version":"1.0","source":{"id":"1208.0243","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.0243","created_at":"2026-05-18T03:49:35Z"},{"alias_kind":"arxiv_version","alias_value":"1208.0243v1","created_at":"2026-05-18T03:49:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.0243","created_at":"2026-05-18T03:49:35Z"},{"alias_kind":"pith_short_12","alias_value":"TY263CWGUPHQ","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_16","alias_value":"TY263CWGUPHQHO27","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_8","alias_value":"TY263CWG","created_at":"2026-05-18T12:27:23Z"}],"graph_snapshots":[{"event_id":"sha256:09d5f1ab3334ff8144ded41e799a54167c17e82a982ddb2e64b30289eb55eb20","target":"graph","created_at":"2026-05-18T03:49:35Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We demonstrate a narrow line, fiber loop laser using Erbium-doped fiber as the gain material, stabilized by using a microsphere as a transmissive frequency selective element. Stable lasing with a linewidth of 170 kHz is observed, limited by the experimental spectral resolution. A linear increase in output power and a red-shift of the lasing mode were also observed with increasing pump power. Its potential application is also discussed.","authors_text":"B. Sprenger, H. G. L. Schwefel, L. J. Wang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-08-01T14:47:16Z","title":"Whispering Gallery Mode Resonator Stabilized Narrow Linewidth Fiber Loop Laser"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.0243","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:fc8fec92e571cf2babd95f88993849187c06e67fb03e91c5da68976da1e6cf2b","target":"record","created_at":"2026-05-18T03:49:35Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"38749dc6165f73c74ce3bb375e4da9f5130afa0b8dcc64d55a98538901cf9f82","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-08-01T14:47:16Z","title_canon_sha256":"603c8be70d7ee5e6f83a432e0f651e2b4ebbeafdb838bf523ad513a28a3411ec"},"schema_version":"1.0","source":{"id":"1208.0243","kind":"arxiv","version":1}},"canonical_sha256":"9e35ed8ac6a3cf03bb5ff1e112a3bdeab9a1d545b96bacc279ed18f685e41c94","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9e35ed8ac6a3cf03bb5ff1e112a3bdeab9a1d545b96bacc279ed18f685e41c94","first_computed_at":"2026-05-18T03:49:35.810069Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:49:35.810069Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jwuzt5xIDzvJi2e+P/RyJ3m1ZxU+JgoBRP8QDUPJmuJl6P2bxCX+QeWNC+623avCM286lmeIwwYGqcrdm8r1Bw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:49:35.810962Z","signed_message":"canonical_sha256_bytes"},"source_id":"1208.0243","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fc8fec92e571cf2babd95f88993849187c06e67fb03e91c5da68976da1e6cf2b","sha256:09d5f1ab3334ff8144ded41e799a54167c17e82a982ddb2e64b30289eb55eb20"],"state_sha256":"4b7c88e8a82678b4b9ce4e882e5d1d4282e877936b57549bd43842299fac0b10"}