1 EXHIBIT 11.1 HARMONIC LIGHTWAVES, INC. COMPUTATION OF NET INCOME PER SHARE (IN THOUSANDS) (UNAUDITED) THREE MONTHS ENDED NINE MONTHS ENDED ------------------------------ ------------------------------ SEPTEMBER 26, SEPTEMBER 27, SEPTEMBER 26, SEPTEMBER 27, 1997 1996 1997 1996 ------------- ------------- ------------- ------------- Net Income $ 413 $ 1,741 $ 4,349 $ 3,513 ======= ======= ======= ======= Weighted average shares outstanding: Common stock 10,384 10,150 10,321 10,072 Common stock issuable upon exercise of options and warrants 1,204 1,427 1,252 1,355 ------- ------- ------- ------- Weighted average common shares and equivalents 11,588 11,577 11,573 11,427 ======= ======= ======= ======= Net income per share (1) $ 0.04 $ 0.15 $ 0.38 $ 0.31 ======= ======= ======= ======= (1) Computed in the manner described in Note 3 to Notes to Condensed Consolidated Financial Statements.