Filed by Bookham Technology plc
                          pursuant to Rule 425 under the Securities Act of 1933
                                               Subject Company: New Focus, Inc.
                                                Commission File No.: 333-109904

This filing relates to a proposed merger between Bookham Technology plc
("Bookham") and New Focus, Inc. ("New Focus") pursuant to the terms of an
Agreement and Plan of Merger, dated as of September 21, 2003, by and among
Bookham, Budapest Acquisition Corp. and New Focus.

On February 4, 2004, Bookham made the following announcement:

3 February 2004
Bookham Technology plc
                     Proposed Acquisition of New Focus, Inc.

In connection with the proposed acquisition of New Focus, Inc. by Bookham
Technology plc ("Bookham"), Amendment No. 4 to Registration Statement on Form
F-4 ("Registration Statement") has been filed by Bookham with the Securities and
Exchange Commission ("SEC") in Washington D.C. The Registration Statement was
declared effective today.

Bookham has also today published a Circular relating to the acquisition of New
Focus, and Listing Particulars. The Circular will be posted to shareholders of
Bookham as soon as practicable and contains a notice of an Extraordinary General
Meeting ("EGM"), at which shareholders will be asked to approve the acquisition
of New Focus. The EGM will be held at The Oxford Centre, 333 Banbury Road,
Oxford OX2 7PL on 5 March 2004 at 10.00 a.m. Copies of the Registration
Statement will be available on the SEC website at

www.sec.gov/edgar.shtml

under Bookham's company filings.

The Registration Statement includes Summary Particulars of Bookham which have
been authorised for issue by the UK Listing Authority ("UKLA"). Copies of the
Circular and the Listing Particulars have been submitted to the UKLA and will
shortly be available for inspection at

the UKLA Document Viewing Facility at
Financial Services Authority
25 The North Colonnade
Canary Wharf
London E14 5HS

For further information, please contact:

Sharon Ostaszewska
Director Communications
Bookham Technology
Tel: +44 (0) 1235 837612

or
Philip Davis
General Counsel & Company Secretary
Bookham Technology
Tel: +44 (0)1235 837781


Bookham Technology plc


IMPORTANT ADDITIONAL INFORMATION WILL BE FILED WITH THE SECURITIES AND EXCHANGE
COMMISSION


     Bookham has filed with the SEC a Registration Statement on Form F-4 in
connection with the transaction and Bookham and New Focus have filed with the
SEC and plan to mail to the stockholders of New Focus, a Joint Proxy
Statement/Prospectus in connection with the transaction. The Registration
Statement and the Joint Proxy Statement/Prospectus contain important information
about Bookham, New Focus, the transaction and related matters. Investors and
security holders are urged to read the Registration Statement and the Joint
Proxy Statement/Prospectus carefully.

     Investors and security holders are able to obtain free copies of the
Registration Statement and the Joint Proxy Statement/Prospectus and other
documents filed with the SEC by Bookham and New Focus through the web site
maintained by the SEC at http://www.sec.gov.

     In addition, investors and security holders are able to obtain free copies
of the Registration Statement and the Joint Proxy Statement/Prospectus from
Bookham by contacting Investor Relations on +44 (0) 1235 837000 or from New
Focus by contacting the Investor Relations Department at +1 408 919 2736.

     Bookham and New Focus, and their respective directors and executive
officers, may be deemed to be participants in the solicitation of proxies in
respect of the transactions contemplated by the merger agreement. Information
regarding Bookham's directors and executive officers is contained in Bookham's
Annual Report on Form 20-F for the year ended December 31, 2002, as amended,
which is filed with the SEC. As of September 1, 2003, Bookham's directors and
executive officers beneficially owned approximately 33,806,421 shares (including
shares underlying options exercisable within 60 days), or 15.92%, of Bookham's
ordinary shares. Information regarding New Focus's directors and executive
officers is contained in New Focus's Annual Report on Form 10-K for the year
ended December 29, 2002 and its proxy statement dated April 15, 2003, which are
filed with the SEC. As of April 15, 2003, New Focus's directors and executive
officers beneficially owned approximately 3,317,696 shares (including shares
underlying options exercisable within 60 days), or 5.2%, of New Focus's common
stock. A more complete description is available in the Registration Statement
and the Joint Proxy Statement/Prospectus.

     STATEMENTS IN THIS DOCUMENT REGARDING THE PROPOSED TRANSACTION BETWEEN
BOOKHAM AND NEW FOCUS, THE EXPECTED TIMETABLE FOR COMPLETING THE TRANSACTION,
FUTURE FINANCIAL AND OPERATING RESULTS, BENEFITS AND SYNERGIES OF THE
TRANSACTION, FUTURE OPPORTUNITIES FOR THE COMBINED COMPANY AND ANY OTHER
STATEMENTS ABOUT BOOKHAM OR NEW FOCUS MANAGEMENTS' FUTURE EXPECTATIONS, BELIEFS,
GOALS, PLANS OR PROSPECTS CONSTITUTE FORWARD-LOOKING STATEMENTS WITHIN THE
MEANING OF THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995. ANY STATEMENTS
THAT ARE NOT STATEMENTS OF HISTORICAL FACT (INCLUDING STATEMENTS CONTAINING THE
WORDS "BELIEVES," "PLANS," "ANTICIPATES," "EXPECTS," "ESTIMATES" AND SIMILAR
EXPRESSIONS) SHOULD ALSO BE CONSIDERED TO BE FORWARD-LOOKING STATEMENTS. 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: THE ABILITY TO CONSUMMATE THE TRANSACTION, THE ABILITY OF BOOKHAM TO
SUCCESSFULLY INTEGRATE NEW FOCUS'S OPERATIONS AND EMPLOYEES, THE ABILITY TO
REALIZE ANTICIPATED SYNERGIES AND COST SAVINGS; RECOVERY OF INDUSTRY DEMAND, THE
NEED TO MANAGE MANUFACTURING CAPACITY, PRODUCTION EQUIPMENT AND PERSONNEL TO
ANTICIPATED LEVELS OF DEMAND FOR PRODUCTS, POSSIBLE DISRUPTION IN NEW FOCUS'S
COMMERCIAL ACTIVITIES CAUSED BY TERRORIST ACTIVITIES OR ARMED CONFLICTS, THE
RELATED IMPACT ON MARGINS, REDUCTIONS IN DEMAND FOR OPTICAL COMPONENTS,
EXPANSION OF OUR BUSINESS OPERATIONS, QUARTERLY VARIATIONS IN RESULTS, CURRENCY
EXCHANGE RATE FLUCTUATIONS, MANUFACTURING CAPACITY YIELDS AND INVENTORY,
INTELLECTUAL PROPERTY ISSUES AND THE OTHER FACTORS DESCRIBED IN BOOKHAM'S ANNUAL
REPORT ON FORM 20-F FOR THE YEAR ENDED DECEMBER 31, 2002, AS AMENDED, AND NEW
FOCUS'S ANNUAL REPORT ON FORM 10-K FOR THE YEAR ENDED DECEMBER 29, 2002 AND NEW
FOCUS'S MOST RECENT QUARTERLY REPORT FILED WITH THE SEC AND BOOKHAM'S MOST
RECENT CURRENT REPORTS ON FORM 6-K SUBMITTED TO THE SEC. BOOKHAM AND NEW FOCUS
DISCLAIM ANY INTENTION OR OBLIGATION TO UPDATE ANY FORWARD-LOOKING STATEMENTS AS
A RESULT OF DEVELOPMENTS OCCURRING AFTER THE DATE OF THIS DOCUMENT.