Improving repetition rates and tuning capabilities of liquid crystal lasers

Margaret Normand, Peigang Chen, Calum Brown, Philip Hands

Research output: Contribution to conferencePoster


Liquid crystal lasers (LCLs) are currently a prominent area of interest in photonics research. Their low-cost, ease of fabrication, self-assembling structure, high efficiencies (some up to 60%) and compact size make LCLs an appealing alternative to larger more expensive tunable systems [1]. There are, however, still several technological hurdles to overcome before viable commercialisation can be achieved.

One such issue is the current limitation of repetition rate. Above a certain pump repetition rate of ~100 Hz, the liquid crystal laser begins to lose efficiency due to optically and thermally induced instabilities [2]. Here we present the highest repetition rates yet achieved. A liquid crystal laser cell was mounted on a disk spinning at a step frequency of 10 kHz and enabled laser pumping at 10 kHz. This minimised energy degradation over time and yielded an average output power of ~3 mW [3].

Multi-wavelength tuning was achieved by mounting cells, each filled with dye-doped liquid crystals of different chiralities, around the circumference of the disk. Twenty different wavelengths were obtained with a rotation rate of 15 Hz and an effective pump frequency of 5 Hz.
Original languageEnglish
Publication statusPublished - 15 Apr 2019
EventBritish Liquid Crystal Society Annual Conference (BLCS 2019) - University of Leeds, Leeds, United Kingdom
Duration: 15 Apr 201917 Apr 2019


ConferenceBritish Liquid Crystal Society Annual Conference (BLCS 2019)
Abbreviated titleBLCS 2019
CountryUnited Kingdom
Internet address


Dive into the research topics of 'Improving repetition rates and tuning capabilities of liquid crystal lasers'. Together they form a unique fingerprint.

Cite this