Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We have issued our reports dated August 29, 2008, with respect to the consolidated financial statements, schedule, and internal control over financial reporting included in the Annual Report of Bookham, Inc. on Form 10-K for the year ended June 28, 2008. We hereby consent to the incorporation by reference of said reports in the Registration Statements of Bookham, Inc. on Forms S-8 (File No. 333-149072, effective February 5, 2008, 333-129825, effective November 18, 2005, 333-13388, effective September 15, 2004, 333-119011, effective September 15, 2004, and 333-113341, effective September 15, 2004), and Forms S-3 (File No. 333-145665, effective October 19, 2007, 333-142270, effective May 9, 2007, 333-137719, effective October 23, 2006, 333-133460, effective April 21, 2006, 333-132069, effective March 16, 2006, 333-128944, effective October 11, 2005, 333-127546, effective October 11, 2005, and 333-122630, effective February 8, 2005).

/s/ GRANT THORNTON LLP

San Francisco, California
August 29, 2008