Revenues from contracts with customers - Schedule of Revenues by End Market (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2023	Jun. 24, 2022	Jun. 25, 2021
Disaggregation of Revenue [Line Items]
Revenues	$ 2,645,237	$ 2,262,224	$ 1,879,350
Revenue from Contract with Customer Benchmark | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenues, percentage	100.00%	100.00%	100.00%
Optical communications
Disaggregation of Revenue [Line Items]
Revenues	$ 2,008,347	$ 1,782,799	$ 1,441,338
Optical communications | Revenue from Contract with Customer Benchmark | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenues, percentage	75.90%	78.80%	76.70%
Lasers, sensors and other
Disaggregation of Revenue [Line Items]
Revenues	$ 636,890	$ 479,425	$ 438,012
Lasers, sensors and other | Revenue from Contract with Customer Benchmark | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenues, percentage	24.10%	21.20%	23.30%