Exhibit 99.1

Oclaro Announces Fourth Quarter and Fiscal Year 2013 Financial Results

SAN JOSE, Calif., – September 16, 2013 – Oclaro, Inc. (NASDAQ: OCLR), a leading provider and innovator of optical communications solutions, today announced the financial results for its fourth quarter and fiscal year 2013, which ended June 29, 2013.

“While our fiscal fourth quarter results were in line with our expectations, the continued losses underscore the urgency of our turnaround plans. We remain focused on transforming Oclaro into a sustainable company that will deliver shareholder value over the long-term,” said Greg Dougherty, CEO, Oclaro. “Our successful sale of the Zurich Business demonstrates to our employees, customers and suppliers that we are taking deliberate action to create a stable future. With the resulting infusion of cash, we can now begin to take the necessary steps to begin to restructure the company. Our goal will be to focus Oclaro primarily on the optical communications market, and leverage our photonics innovation, vertical integration, and long-term customer relationships to return Oclaro to profitability.”

Results for the Fourth Quarter of Fiscal 2013:

Results for Fiscal Year 2013:

The financial results for fiscal year 2013 include the results of Oclaro for the full year and the contribution from the former Opnext, Inc after the merger closed on July 23, 2012. The results for fiscal year 2012 reflect Oclaro as a standalone company.

First Quarter Fiscal Year 2014 Outlook

The results of Oclaro for the first quarter of fiscal 2014, which ends September 28, 2013, are expected to be:

Guidance includes the expected results of the Zurich Business, which was sold on September 12, 2013, from June 30, 2013 through the closing date of September 12, 2013.

The foregoing guidance is based on current expectations. These statements are forward looking, and actual results may differ materially. Please see the Safe Harbor Statement in this earnings release for a description of certain important risk factors that could cause actual results to differ, and refer to Oclaro’s most recent annual and quarterly reports on file with the Securities and Exchange Commission (SEC) for a more complete description of these risks. Furthermore, our outlook excludes items that may be required by GAAP, including, but not limited to, restructuring and related costs, acquisition or disposal related costs, any additional flood-related expenses, expenses or income from certain legal actions, settlements and related costs outside our normal course of business, impairments of other long-lived assets, depreciation and amortization, extraordinary items, as well as the expensing of stock options and restricted stock grants. We do not intend to update this guidance as a result of developments occurring after the date of this release.

Conference Call

Oclaro will hold a conference call to discuss financial results for the fourth quarter and fiscal year 2013 today at 2:00 p.m. PT/5:00 p.m. ET. To listen to the live conference call, please dial (480) 629-9760. A replay of the conference call will be available through September 23, 2013. To access the replay, dial (858) 384-5517. The passcode for the replay is 4639762. A webcast of this call and a supplemental presentation will be available in the investor section of Oclaro’s website at www.oclaro.com.

About Oclaro

Oclaro, Inc. (NASDAQ: OCLR) is one of the largest providers of optical components, modules and subsystems for the optical communications market. The company is a global leader dedicated to photonics innovation, with cutting-edge research and development (R&D) and chip fabrication facilities in the U.S., U.K., Italy, Korea and Japan. It has in-house and contract manufacturing sites in China, Malaysia and Thailand, with design, sales and service organizations in most of the major regions around the world. For more information, visit http://www.oclaro.com. Copyright 2013. All rights reserved. Oclaro, the Oclaro logo, and certain other Oclaro trademarks and logos are trademarks and/or registered trademarks of Oclaro, Inc. or its subsidiaries in the U.S. and other countries. Information in this release is subject to change without notice.

Safe Harbor Statement

This press release, in association with Oclaro’s fourth quarter and fiscal year 2013 financial results conference call, contains statements about management’s future expectations, plans or prospects of Oclaro and its business, and together with the assumptions underlying these statements, constitute forward-looking statements for the purposes of the safe harbor provisions of The Private Securities Litigation Reform Act of 1995. These forward-looking statements include statements concerning (i) financial targets and expectations and progress toward Oclaro’s target business model, including financial guidance for the fiscal quarter ending September 28, 2013 regarding revenue, non-GAAP gross margin and Adjusted EBITDA, (ii) expectation regarding the sale of its Zurich business, (iii) expectation regarding exercising of the option and closing the sale of the Amplifier business, (iv) restructuring Oclaro for the future, (v) simplifying Oclaro’s operating footprint, and (vi) Oclaro’s market position and future operating prospects. Such statements can be identified by the fact that they do not relate strictly to historical or current facts and may contain words such as “anticipate,” “estimate,” “expect,” “project,” “intend,” “plan,” “believe,” “will,” “should,” “outlook,” “could,” “target,” “model,” and other words and terms of similar meaning in connection with any discussion of future operations or financial performance. There are a number of important factors that could cause actual results or events to differ materially from those indicated by such forward-looking statements, including (i) The exercise of the option to purchase the optical amplifier and micro optics business (“Amplifier business”) and Oclaro’s ability to close the sale of the Amplifier business, (ii) the future performance of Oclaro and its ability to effectively integrate the operations of acquired companies following the closing of acquisitions and mergers, including its merger with Opnext, and to effectively restructure its operations and business following the sale of its Zurich and future option exercise and sale of its Amplifier business in accordance with its business plan, (iii) the potential inability to realize the expected and ongoing benefits and synergies of acquisitions and mergers and benefits of asset dispositions, (iv) the impact to our operations, revenues and financial condition attributable to the flooding in Thailand, (v) the impact of continued uncertainty in world financial markets and any resulting reduction in demand for our products, (vi) our ability to meet or exceed our gross margin expectations, (vii) the effects of fluctuating product mix on our results, (viii) our ability to timely develop and commercialize new products, (ix) our ability to reduce costs and operating expenses, (x) our ability to respond to evolving technologies and customer requirements and demands, (xi) our dependence on a limited number of customers for a significant percentage of our revenues, (xii) our ability to maintain strong relationships with certain customers, (xiii) our ability to effectively compete with companies that have greater name recognition, broader customer relationships and substantially greater financial, technical and marketing resources than we do, (xiv) our ability to effectively and efficiently transition to an outsourced back-end assembly and test model, (xv) our ability to timely capitalize on any increase in market demand, (xvi) increased costs related to downsizing and compliance with regulatory and legal requirements in connection with such downsizing, (xvii) competition and pricing pressure, (xviii) the potential lack of availability of credit or opportunity for equity based financing, (xix) the risks associated with our international operations, (xx) Oclaro’s ability to service and repay its remaining outstanding indebtedness pursuant to the terms of the applicable agreements, (xxi) the outcome of tax audits or similar proceedings, (xxii) the outcome of pending litigation against the company, (xxiii) Oclaro’s ability to maintain or increase its cash reserves and obtain financing on terms acceptable to it or at all, and (xxiv) other factors described in Oclaro’s most recent annual report on Form 10-K, quarterly report on Form 10-Q and other documents it periodically files with the SEC. The forward-looking statements included in this announcement represent Oclaro’s view as of the date of this announcement. Oclaro anticipates that subsequent events and developments may cause Oclaro’s views and expectations to change. Oclaro specifically disclaims any intention or obligation to update any forward-looking statements as a result of developments occurring after the date of this announcement.

Non-GAAP Financial Measures

Oclaro provides certain supplemental non-GAAP financial measures to its investors as a complement to the most comparable GAAP measures. The GAAP measure most directly comparable to non-GAAP gross margin rate is gross margin rate. The GAAP measure most directly comparable to non-GAAP operating income/loss is operating income/loss. The GAAP measure most directly comparable to non-GAAP net income/loss and Adjusted EBITDA is net income/loss. An explanation and reconciliation of each of these non-GAAP financial measures to GAAP information is set forth below.

Oclaro believes that providing these non-GAAP measures to its investors, in addition to corresponding income statement measures, provides investors the benefit of viewing Oclaro’s performance using the same financial metrics that the management team uses in making many key decisions and evaluating how Oclaro’s “core operating performance” and its results of operations may look in the future. Oclaro defines “core operating performance” as its ongoing performance in the ordinary course of its operations. Items that are non-recurring or do not involve cash expenditures, such as impairment charges, income taxes, restructuring and severance programs, costs relating to specific major projects (such as acquisitions), gain on bargain purchase, non-cash compensation related to stock and options and certain income, purchase accounting adjustments related to the fair market value of acquired inventories, costs to outsource our back-end manufacturing activities, write-offs and expenses related to flooding in Thailand, including advance payments received from insurers, impairment of fixed assets and inventory and related expenses, are not included in Oclaro’s view of “core operating performance.” Management does not believe these items are reflective of Oclaro’s ongoing core operations and accordingly excludes those items from non-GAAP gross margin rate, non-GAAP operating income/loss, non-GAAP net income/loss and Adjusted EBITDA. Additionally, each non-GAAP measure has historically been presented by Oclaro as a complement to its most comparable GAAP measure, and Oclaro believes that the continuation of this practice increases the consistency and comparability of Oclaro’s earnings releases.

Non-GAAP financial measures are not in accordance with, or an alternative for, generally accepted accounting principles in the United States of America. Non-GAAP measures should not be considered in isolation from or as a substitute for financial information presented in accordance with generally accepted accounting principles, and may be different from non-GAAP measures used by other companies.

Non-GAAP Gross Margin Rate

Non-GAAP gross margin rate is calculated as gross margin rate as determined in accordance with GAAP (gross profit as a percentage of revenues) excluding non-cash compensation related to stock and options, purchase accounting adjustments related to the fair market value of acquired inventories and costs to outsource our back-end manufacturing activities. Oclaro evaluates its performance using non-GAAP gross margin rate to assess Oclaro’s historical and prospective operating financial performance, as well as its operating performance relative to its competitors.

Non-GAAP Operating Income/Loss

Non-GAAP operating income/loss is calculated as operating income/loss as determined in accordance with GAAP excluding the impact of amortization of intangible assets, restructuring, acquisition and related costs, non-cash compensation related to stock and options granted to employees and directors, impairment of intangible assets and goodwill, certain other one-time charges and credits and excluding any flood related advance payments received from insurers, impairment of fixed assets and inventory and related expenses specifically identified in the non-GAAP reconciliation schedules set forth below. Oclaro evaluates its performance using, among other things, non-GAAP operating income/loss in evaluating Oclaro’s historical and prospective operating financial performance, as well as its operating performance relative to its competitors.

Non-GAAP Net Income/Loss

Non-GAAP net income/loss is calculated as net income/loss excluding the impact of restructuring, acquisition and related costs, gain on bargain purchase, Thailand flood-related income and expenses, non-cash compensation related to stock and options granted to employees and directors, net foreign currency translation gains/losses, the impact of amortization of intangible assets, impairment of intangible assets and goodwill and certain other one-time charges and credits specifically identified in the non-GAAP reconciliation schedules set forth below. Oclaro uses non-GAAP net income/loss in evaluating Oclaro’s historical and prospective operating financial performance, as well as its operating performance relative to its competitors.

Adjusted EBITDA

Adjusted EBITDA is calculated as net income/loss excluding the impact of income taxes, net interest income/expense, depreciation and amortization, net foreign currency translation gains/losses, as well as restructuring, acquisition and related costs, non-cash compensation related to stock and options, gain on bargain purchase, purchase accounting adjustments related to the fair market value of acquired inventories, impairment of intangible assets and goodwill and certain other one-time charges and credits, including flood related advance payments received from insurers, impairment of fixed assets and inventory and related expenses, specifically identified in the non-GAAP reconciliation schedules set forth below. Oclaro uses Adjusted EBITDA in evaluating Oclaro’s historical and prospective cash usage, as well as its cash usage relative to its competitors. Specifically, management uses this non-GAAP measure to further understand and analyze the cash used in/generated from Oclaro’s core operations. Oclaro believes that by excluding these non-cash and non-recurring charges, more accurate expectations of its future cash needs can be assessed in addition to providing a better understanding of the actual cash used in or generated from core operations for the periods presented. Oclaro further believes that providing this information allows Oclaro’s investors greater transparency and a better understanding of Oclaro’s core cash position.

OCLARO, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(unaudited, in thousands, except per share amounts)

OCLARO, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(unaudited, in thousands)

OCLARO, INC.

RECONCILIATION OF GAAP FINANCIAL MEASURES TO NON-GAAP FINANCIAL MEASURES

(unaudited, in thousands, except per share amounts)