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SHARE-BASED COMPENSATION EXPENSE
 6 Months Ended
Apr. 29, 2023
Share-Based Payment Arrangement [Abstract]  
SHARE-BASED COMPENSATION EXPENSE SHARE-BASED COMPENSATION EXPENSE
The following table summarizes share-based compensation expense for the periods indicated (in thousands):
Quarter EndedSix Months Ended
 April 29,April 30,April 29,April 30,
 2023202220232022
Products$1,155 $1,058 $2,206 $1,958 
Services2,659 1,943 4,956 3,527 
Share-based compensation expense included in cost of goods sold3,814 3,001 7,162 5,485 
Research and development10,731 8,309 19,965 15,140 
Selling and marketing8,755 8,061 17,179 15,121 
General and administrative8,468 7,334 17,936 15,246 
Share-based compensation expense included in operating expense27,954 23,704 55,080 45,507 
Share-based compensation expense capitalized in inventory, net92 (32)130 (22)
Total share-based compensation expense$31,860 $26,673 $62,372 $50,970 

As of April 29, 2023, total unrecognized share-based compensation expense was approximately $260.7 million, which relates to unvested stock unit awards and is expected to be recognized over a weighted-average period of 1.52 years.
Stock Unit AwardsBeginning in December 2022, Ciena introduced a benefit, under which, upon completion of ten years of service and reaching age 60, executive officers who are residents of the United States, the United Kingdom, or Canada and who provide 12 months’ notice of their retirement will receive continued vesting of all of their granted but unvested restricted stock unit (“RSU”) awards and a pro-rated amount of their performance stock unit awards and market stock unit awards. Other employees in these countries will be subject to the same eligibility and notice requirements, but will receive acceleration of their granted but unvested RSU awards upon retirement. This program accelerates the recognition of share-based compensation expense.