  CYCLOPS2 is an upgrade for the UCLES high resolution spectrograph on the
Anglo-Australian Telescope, scheduled for commissioning in semester 2012A. By
replacing the 5 mirror Coud\'e train with a Cassegrain mounted fibre-based
image slicer CYCLOPS2 simultaneously provides improved throughput, reduced
aperture losses and increased spectral resolution. Sixteen optical fibres
collect light from a 5.0 arcsecond^2 area of sky and reformat it into the
equivalent of a 0.6 arcsecond wide slit, delivering a spectral resolution of R
= 70000 and up to twice as much flux as the standard 1 arcsecond slit of the
Coud\'e train. CYCLOPS2 also adds support for simultaneous ThAr wavelength
calibration via a dedicated fibre. CYCLOPS2 consists of three main components,
the fore-optics unit, fibre bundle and slit unit. The fore optics unit
incorporates magnification optics and a lenslet array and is designed to mount
to the CURE Cassegrain instrument interface, which provides acquisition,
guiding and calibration facilities. The fibre bundle transports the light from
the Cassegrain focus to the UCLES spectrograph at Coud\'e and also includes a
fibre mode scrambler. The slit unit consists of the fibre slit and relay optics
to project an image of the slit onto the entrance aperture of the UCLES
spectrograph. CYCLOPS2 builds on experience with the first generation CYCLOPS
fibre system, which we also describe in this paper. We present the science case
for an image slicing fibre feed for echelle spectroscopy and describe the
design of CYCLOPS and CYCLOPS2.

Instrumentation and Methods for Astrophysics