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Design of rare-earth-doped microbottle lasers

Design of rare-earth-doped microbottle lasers
Design of rare-earth-doped microbottle lasers

Coupling strength in taper-coupled microbottle resonators can be tuned by offsetting the taper along the resonator profile, similar to controlling the air-gap in microsphere excitation, and hence, achieve desired coupling characteristics for a specific mode. Such flexibility makes microbottles attractive and adaptable laser cavities. In this paper, lasing characteristics of Yb3+-doped microbottle laser (MBL) coupled to tapered fiber are theoretically investigated. It is demonstrated that desired lasing characteristics for a particular mode are achievable by controlling the taper-resonator coupling, intrinsic quality factor (Q) and dopant concentration. Although, high Q whispering gallery cavities provide high internal powers, which is favorable especially for low gain materials, they lack high output powers. Hence, care should be taken in designing MBLs to attain the highest possible output power. Here, we address such issues, and optimized the required resonator parameters (for both pump and signal) for a low threshold pump power, high efficiency and desired lasing wavelength.

1094-4087
26339-26354
Bakhtiari Gorajoobi, Shahab
ba37e5f9-6a5e-4beb-82eb-b932613fba55
Murugan, Ganapathy Senthil
a867686e-0535-46cc-ad85-c2342086b25b
Zervas, Michalis N.
1840a474-dd50-4a55-ab74-6f086aa3f701
Bakhtiari Gorajoobi, Shahab
ba37e5f9-6a5e-4beb-82eb-b932613fba55
Murugan, Ganapathy Senthil
a867686e-0535-46cc-ad85-c2342086b25b
Zervas, Michalis N.
1840a474-dd50-4a55-ab74-6f086aa3f701

Bakhtiari Gorajoobi, Shahab, Murugan, Ganapathy Senthil and Zervas, Michalis N. (2018) Design of rare-earth-doped microbottle lasers. Optics Express, 26 (20), 26339-26354. (doi:10.1364/OE.26.026339).

Record type: Article

Abstract

Coupling strength in taper-coupled microbottle resonators can be tuned by offsetting the taper along the resonator profile, similar to controlling the air-gap in microsphere excitation, and hence, achieve desired coupling characteristics for a specific mode. Such flexibility makes microbottles attractive and adaptable laser cavities. In this paper, lasing characteristics of Yb3+-doped microbottle laser (MBL) coupled to tapered fiber are theoretically investigated. It is demonstrated that desired lasing characteristics for a particular mode are achievable by controlling the taper-resonator coupling, intrinsic quality factor (Q) and dopant concentration. Although, high Q whispering gallery cavities provide high internal powers, which is favorable especially for low gain materials, they lack high output powers. Hence, care should be taken in designing MBLs to attain the highest possible output power. Here, we address such issues, and optimized the required resonator parameters (for both pump and signal) for a low threshold pump power, high efficiency and desired lasing wavelength.

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More information

Accepted/In Press date: 12 September 2018
e-pub ahead of print date: 25 September 2018
Published date: 1 October 2018

Identifiers

Local EPrints ID: 425078
URI: http://eprints.soton.ac.uk/id/eprint/425078
ISSN: 1094-4087
PURE UUID: 4e9726bf-f225-4294-87db-a6b71d54a839
ORCID for Ganapathy Senthil Murugan: ORCID iD orcid.org/0000-0002-2733-3273
ORCID for Michalis N. Zervas: ORCID iD orcid.org/0000-0002-0651-4059

Catalogue record

Date deposited: 10 Oct 2018 16:30
Last modified: 17 Dec 2019 02:02

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