Ms. Divya N. Nair Profile

Divya N. Nair

at Indian Institute of Science

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 2 March 2020 Presentation + Paper

High repetition rate sub-picosecond pulse generation through compression of adaptively optimised frequency combs based on phase-modulated continuous wave lasers

B. S. Vikram, Roopa Prakash, Divya Nair, Shankar Kumar Selvaraja, V. R. Supradeepa

Proceedings Volume 11264, 1126406 (2020) https://doi.org/10.1117/12.2546631

KEYWORDS: Frequency combs, Picosecond phenomena, Electro optics, Pulsed laser operation, Modulators, Interferometry, Continuous wave operation, Nonlinear optics, Optical fibers

Read Abstract +

High repetition rate pulsed lasers are used for applications such as highspeed optical communications, nonlinear optics and optical sampling. Conventionally, mode locked lasers are used as pulsed sources. However, they suffer from low repetition rate that is not tunable. Electro-optic modulation allows generation of frequency combs with tunable high repetition rate. These combs can be compressed to generate pulses, but the pulse widths are large owing to the limited bandwidth of electro-optic frequency combs. Though, modulators can be cascaded to scale the bandwidth, it is only a linear enhancement and requires additional RF components. Spectral broadening of these combs in nonlinear fibers results in marginally improved bandwidths. The broadening achieved at a given optical power can be enhanced several times by suitably modifying the temporal profile of the comb before spectral broadening with a pulse-shaper. In this work, electro-optic intensity and phase modulators are driven at 25GHz to generate an initial comb. A pulse-shaper adaptively optimises the temporal profile of the electro-optic frequency comb to enhance the spectral broadening in highly nonlinear fiber (HNLF). The optimised comb is power scaled in an Er-Yb co-doped fiber amplifier before HNLF. The adaptively optimised comb is compressed with single mode fiber and is characterized with zero delay implementation of spectral shearing interferometry to obtain the spectral phase and temporal profile of the pulses. The output pulses have 1 dB bandwidth of ~0.6 ps and 3 dB bandwidth of ~ 1 ps with high repetition rate of 25GHz. This adaptive technique is shown to be immune to drifts and changes in modulator drive conditions.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years