1

                                                                    EXHIBIT 23.4

               CONSENT OF ARTHUR ANDERSEN, CHARTERED ACCOUNTANTS

We consent to the reference to our firm under the captions "Selected Historical
Consolidated Financial Data of SDL" and "Experts" in the Proxy Statement of JDS
Uniphase Corporation and SDL, Inc. that is made part of the Registration
Statement (Form S-4) and Prospectus of JDS Uniphase Corporation for the
registration of shares of its common stock to be issued in connection with the
acquisition of SDL, Inc. and to the incorporation by reference therein of our
report dated 15 October 1998 with respect to the consolidated financial
statements of IOC International plc as at 30 September 1998 and for each of the
two years in the period ended 30 September 1998, incorporated by reference in
SDL, Inc.'s Annual Report (Form 10-K) for the year ended 31 December 1999, filed
with the Securities and Exchange Commission.

/s/ ARTHUR ANDERSEN

Arthur Andersen, Chartered Accountants

Cambridge, England
September 5, 2000