Geographic Information, Product Groups And Customer Concentration - Additional Information (Detail)	12 Months Ended
	Jun. 28, 2014 Segment	Jun. 29, 2013 Segment	Jun. 30, 2012 Segment
Revenue, Major Customer [Line Items]
Number of operating segments	1	1	1
Concentration risk percentage	42.00%	33.00%
Cisco
Revenue, Major Customer [Line Items]
Concentration risk percentage	13.00%	14.00%
Huawei
Revenue, Major Customer [Line Items]
Concentration risk percentage	11.00%	10.00%
Percentage of accounts receivable	13.00%	15.00%
Coriant
Revenue, Major Customer [Line Items]
Concentration risk percentage	20.00%	14.00%
Percentage of accounts receivable	19.00%
Fujitsu Limited
Revenue, Major Customer [Line Items]
Concentration risk percentage			20.00%
ADVA Optical Networking
Revenue, Major Customer [Line Items]
Concentration risk percentage			11.00%
Ciena Corporation
Revenue, Major Customer [Line Items]
Concentration risk percentage			10.00%