EXHIBIT 23.4



CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

As independent public accountants, we hereby consent to the use of our report
dated January 25, 2001, (except for matters discussed in Note 14 as to which
the date is October 4, 2001) pertaining to Luminent, Inc. as of December 31,
1999 and 2000, and for each of the three years in the period ended December 31,
2000, (and to all reference to our Firm) included in or made a part of this
registration statement (Registration No. 333-44536).



/s/ Arthur Andersen LLP


Arthur Andersen LLP
Los Angeles, California
December 20, 2001