BASIS OF PREPARATION (Policies)	9 Months Ended
BASIS OF PREPARATION (Policies)	Mar. 28, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation Oclaro, Inc., a Delaware corporation, is sometimes referred to in this Quarterly Report on Form 10-Q as “Oclaro,” “we,” “us” or “our.” On August 5, 2014, we entered into a separation agreement to sell our industrial and consumer business of Oclaro Japan located at our Komoro, Japan facility to Ushio Opto Semiconductors, Inc. ("Ushio Opto"). On October 27, 2014, the sale was completed. The transaction is more fully discussed in Note 5, Business Combinations and Dispositions. On November 1, 2013, we sold our optical amplifier and micro-optics business (the “Amplifier Business”) to II-VI Incorporated (II-VI). The sale is more fully discussed in Note 5, Business Combinations and Dispositions. On September 12, 2013, we sold our Oclaro Switzerland GmbH subsidiary and associated laser diodes and pump business (the “Zurich Business”) to II-VI. The sale is more fully discussed in Note 5, Business Combinations and Dispositions. These sales are reported as discontinued operations, which require retrospective restatement of prior periods to classify the results of operations as discontinued operations. The notes to our condensed consolidated financial statements relate to our continuing operations only, unless otherwise indicated. The accompanying unaudited condensed consolidated financial statements of Oclaro as of March 28, 2015 and for the three and nine months ended March 28, 2015 and March 29, 2014 have been prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP") for interim financial information and with the instructions to Article 10 of Securities and Exchange Commission ("SEC") Regulation S-X, and include the accounts of Oclaro and all of our subsidiaries. Accordingly, they do not include all of the information and footnotes required by such accounting principles for annual financial statements. In the opinion of management, all adjustments (consisting only of normal recurring adjustments) considered necessary for a fair presentation of our consolidated financial position and results of operations have been included. The condensed consolidated results of operations for the three and nine months ended March 28, 2015 are not necessarily indicative of results that may be expected for any other interim period or for the full fiscal year ending June 27, 2015. The condensed consolidated balance sheet as of June 28, 2014 has been derived from our audited financial statements as of such date, but does not include all disclosures required by U.S. GAAP. These unaudited condensed consolidated financial statements should be read in conjunction with our audited financial statements included in our Annual Report on Form 10-K for the year ended June 28, 2014 ("2014 Form 10-K").
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the reported periods. Examples of significant estimates and assumptions made by management involve the fair value of other intangible assets and long-lived assets, valuation allowances for deferred tax assets, the fair value of stock-based compensation, estimates used to determine facility lease loss liabilities, estimates for allowances for doubtful accounts and valuation of excess and obsolete inventories. These judgments can be subjective and complex and consequently actual results could differ materially from those estimates and assumptions. Descriptions of the key estimates and assumptions are included in our 2014 Form 10-K.
Fiscal Years	Fiscal Years We operate on a 52/53 week year ending on the Saturday closest to June 30. Our fiscal year ending June 27, 2015 will be a 52 week year, with the quarter ended March 28, 2015 being a 13 week quarterly period. Our fiscal year ended June 28, 2014 was a 52 week year, with the quarter ended March 29, 2014 being a 13 week quarterly period.
Reclassifications	Reclassifications For presentation purposes, we have reclassified certain prior period amounts to conform to the current period financial statement presentation. These reclassifications did not affect our consolidated revenues, net income (loss), cash flows, cash and cash equivalents or stockholders’ equity as previously reported.
Recent Accounting Standards	RECENT ACCOUNTING STANDARDS In April 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2015-03, Simplifying the Presentation of Debt Issuance Costs. Under ASU 2015-03, debt issuance costs are required to be presented as a direct deduction of debt balances on the balance sheet. This new standard does not affect the recognition and measurement of debt issuance costs. ASU 2015-03 will be effective on a retrospective basis, as a change in accounting principle, for years beginning after December 15, 2015 and interim periods within annual periods beginning after December 15, 2016. We are currently evaluating the impact that the implementation of this standard will have on our financial statements. In January 2015, the FASB issued ASU No. 2015-01, Income Statement - Extraordinary and Unusual Items. This ASU eliminates from U.S. GAAP the concept of extraordinary items. Eliminating the extraordinary classification simplifies income statement presentation by altogether removing the concept of extraordinary items from consideration. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. This guidance is effective for us prospectively in the first quarter of fiscal year 2017. We are currently evaluating the impact that the implementation of this standard will have on our financial statements. In August 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements—Going Concern. The update provides U.S. GAAP guidance on management’s responsibility in evaluating whether there is substantial doubt about a company’s ability to continue as a going concern and about related footnote disclosures. For each reporting period, management will be required to evaluate whether there are conditions or events that raise substantial doubt about a company’s ability to continue as a going concern within one year from the date the financial statements are issued. This guidance is effective for us beginning with our annual financial statements for the fiscal year ended July 1, 2017, and interim periods thereafter. We are currently evaluating the impact that the implementation of this standard will have on our financial statements. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers. This update clarifies the principles for recognizing revenue and develops a common revenue standard for GAAP and International Financial Reporting Standards. The standard outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance. This guidance is effective for fiscal years and interim periods within those years beginning after December 15, 2016. This guidance is effective for us prospectively in the first quarter of fiscal year 2018. We are currently evaluating the impact that the implementation of this standard will have on our financial statements. In April 2014, the FASB issued ASU No. 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity. This update requires that a disposal representing a strategic shift that has (or will have) a major effect on an entity's financial results be reported as discontinued operations. The standard also expands the disclosures for discontinued operations and requires new disclosures related to individually material disposals that do not meet the definition of a discontinued operation. The provisions of this ASU are effective for interim and annual periods beginning after December 15, 2014. We early adopted this guidance in our first quarter of fiscal year 2015. In accordance with this guidance, our sale of the Komoro Business does not meet the definition of a discontinued operation. We consider this sale as an individually material disposal and have expanded our disclosures related to this transaction, including presenting the pre-tax profit (loss) of the Komoro Business for the nine months ended March 28, 2015 and the three and nine months ended March 29, 2014, respectively.

Disclosure of accounting policy for determining an entity's fiscal year or other fiscal period. This disclosure may include identification of the fiscal period end-date, the length of the fiscal period, any reporting period lag between the entity and its subsidiaries, or equity investees. If a reporting lag exists, the closing date of the entity having a different period end is generally noted, along with an explanation of the necessity for using different closing dates. Any intervening events that materially affect the entity's financial position or results of operations are generally also disclosed.

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