* Q4 loss $0.11/shr vs est $0.12/shr

* Revenue falls 33 pct but beats estimates

* Sees Q1 rev $41 mln-$43 mln vs est $40.6 mln

* Shares rise 13 pct after the bell

 Emcore Corp (EMKR.O), a maker of compound semiconductor-based components and subsystems, posted fourth-quarter results above estimates, helped by a steep fall in operating expenses, and forecast first-quarter revenue above market expectations.

For the first quarter, Emcore expects revenue of $41 million to $43 million as it sees increases in both the photovoltaics and fiber optics segments.

Analysts on average were looking for revenue of $40.6 million, according to Thomson Reuters I/B/E/S.

The company posted a net loss of $13.5 million, or 17 cents a share, for the fourth quarter ended Sept. 30, compared with a loss of $41.2 million, or 53 cents a share, a year ago.

Excluding special items, Emcore posted a loss of 11 cents a share, narrower than analysts' average expectations of a loss of 12 cents a share.

Revenue dropped 33 percent to $40.5 million, but blew past analysts' average estimate of $39.8 million.

Operating expenses more than halved to $18 million.

Shares of the company jumped 13 percent to $1.06 in trading after the bell. They closed at 94 cents in regular trading Tuesday on Nasdaq. (Reporting by Manasi Phadke in Bangalore; Editing by Gopakumar Warrier)