Revenues from contracts with customers - Schedule of Revenues by End Market (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 28, 2024	Jun. 30, 2023	Jun. 24, 2022
Disaggregation of Revenue [Line Items]
Revenues	$ 2,882,967	$ 2,645,237	$ 2,262,224
Product Concentration Risk | Revenue from Contract with Customer Benchmark
Disaggregation of Revenue [Line Items]
Revenues, percentage	100.00%	100.00%	100.00%
Optical communications
Disaggregation of Revenue [Line Items]
Revenues	$ 2,289,015	$ 2,008,347	$ 1,782,799
Optical communications | Product Concentration Risk | Revenue from Contract with Customer Benchmark
Disaggregation of Revenue [Line Items]
Revenues, percentage	79.40%	75.90%	78.80%
Optical communications | Datacom
Disaggregation of Revenue [Line Items]
Revenues	$ 1,150,307	$ 520,796	$ 361,306
Optical communications | Telecom
Disaggregation of Revenue [Line Items]
Revenues	1,138,708	1,487,551	1,421,493
Non-optical communications
Disaggregation of Revenue [Line Items]
Revenues	$ 593,952	$ 636,890	$ 479,425
Non-optical communications | Product Concentration Risk | Revenue from Contract with Customer Benchmark
Disaggregation of Revenue [Line Items]
Revenues, percentage	20.60%	24.10%	21.20%
Non-optical communications | Automotive
Disaggregation of Revenue [Line Items]
Revenues	$ 327,188	$ 368,581	$ 204,407
Non-optical communications | Industrial laser
Disaggregation of Revenue [Line Items]
Revenues	122,722	125,415	149,357
Non-optical communications | Others
Disaggregation of Revenue [Line Items]
Revenues	$ 144,042	$ 142,894	$ 125,661