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INTANGIBLE ASSETS (Tables)
 12 Months Ended
Nov. 01, 2025
Intangible Assets, Net (Excluding Goodwill) [Abstract]  
Schedule of Intangible Assets
As of the dates indicated, intangible assets are comprised of the following (in thousands):
 November 1, 2025November 2, 2024
Gross
Intangible		Accumulated
Amortization		Net
Intangible		Gross
Intangible		Accumulated
Amortization		Net
Intangible
Developed technology$601,618 $(466,827)$134,791 $503,618 $(442,345)$61,273 
In-process research and development (1)
86,000 — 86,000 89,100 — 89,100 
Patents and licenses9,295 (6,898)2,397 8,795 (6,150)2,645 
Customer relationships, covenants not to compete, outstanding purchase orders and contracts410,899 (409,877)1,022 410,934 (398,932)12,002 
Total intangible assets$1,107,812 $(883,602)$224,210 $1,012,447 $(847,427)$165,020 

(1) During fiscal 2025, approximately $89.1 million was abandoned from in-process research and development with a corresponding expense reported in significant asset impairments and restructuring costs on the Consolidated Statement of Operations. Additionally, Ciena acquired $86.0 million of in-process research and development technology with its acquisition of Nubis. See Notes 3 and 4 above.
Schedule of Expected Future Amortization of Finite-lived Intangible Assets Expected future amortization of intangible assets for the fiscal years indicated is as follows (in thousands):
Fiscal Year
Amount (1)
2026$43,019 
202735,514 
202821,663 
202919,797 
203018,074 
Thereafter143 
 $138,210 
(1) Does not include amortization of in-process research and development, as estimation of the timing of future amortization expense would be impractical.